"Fail to send" error consistently appearing in Antigravity

Spring_Lee · March 10, 2026, 5:58am

Hi Antigravity Team,

I’m experiencing a persistent “fail to send” error in Antigravity. I’ve already searched and read through related posts in the community, but unfortunately, none of the existing solutions have worked for me.

Here is the detailed context of my issue:

Environment & Symptoms:

Antigravity Version: 1.20.5 (The latest version as of now).
Core Issue 1: Every attempt to send a prompt returns a “fail to send” error.
Core Issue 2: The Agent Manager page is constantly stuck on the “Agent loading…” status and never completes.

Troubleshooting Steps Already Taken:

Reinstallation: I have completely uninstalled and reinstalled the application multiple times, but the exact same issues persist.
Proxy Configuration: To rule out common network routing issues, I want to clarify that I have never used Antigravity to reverse-proxy OpenClaw.

Since I’m completely blocked from using the tool right now, could anyone point me in the right direction? Are there specific local log files I should check to debug this “Agent loading” loop?

Any guidance or help would be greatly appreciated!

Thanks,

Ashwin_Krishnan · March 14, 2026, 12:41pm

I am facing the same issue for the last 4 days
Basically antigravity is pretty much unusable

2026-03-14 12:40:16.003 [info] I0314 12:40:16.003036 27175 http_helpers.go:123] URL: https://daily-cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse Trace: 0x5f4f475b835fba58
2026-03-14 12:40:16.003 [info] I0314 12:40:16.003036 27175 http_helpers.go:123] URL: https://daily-cloudcode-pa.googleapis.com/v1internal:streamGenerateContent?alt=sse Trace: 0x5f4f475b835fba58

2026-03-14 12:40:18.878 [info] E0314 12:40:18.878537 27175 log.go:398] agent executor error: could not convert a single message before hitting truncation

Trajectory ID: 14ae4888-4990-422
Error: agent executor error: could not convert a single message before hitting truncation
(1) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2096
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| third_party/jetski/cortex/cascade_manager.go:2144
Wraps: (2) agent executor error
Wraps: (3) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).GetNumTokensSinceLastCheckpoint
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:550
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7.1
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:43
| google3/third_party/jetski/cortex/executors/executors.(*CascadeWrapper).ViewTrajectory
| third_party/jetski/cortex/executors/cascade_wrapper.go:258
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:33
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).executeLoop
| third_party/gemini_coder/framework/executor/executor.go:388
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:277
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2061
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| third_party/jetski/cortex/cascade_manager.go:2144
Wraps: (4) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).TrajectoryToChatMessagesFromNCheckpointsAgo
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:1135
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).GetNumTokensSinceLastCheckpoint
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:548
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7.1
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:43
| google3/third_party/jetski/cortex/executors/executors.(*CascadeWrapper).ViewTrajectory
| third_party/jetski/cortex/executors/cascade_wrapper.go:258
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:33
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).executeLoop
| third_party/gemini_coder/framework/executor/executor.go:388
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:277
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2061
| […repeated from below…]
Wraps: (5) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.init
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:44
| runtime.doInit1
| third_party/go/gc/src/runtime/proc.go:8105
| runtime.doInit
| third_party/go/gc/src/runtime/proc.go:8072
| runtime.main
| third_party/go/gc/src/runtime/proc.go:258
| runtime.goexit
| third_party/go/gc/src/runtime/asm_arm64.s:1447
Wraps: (6) could not convert a single message before hitting truncation
Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *withstack.withStack (4) *withstack.withStack (5) *withstack.withStack (6) *errutil.leafError

Hassan_Howe · March 16, 2026, 10:24am

i encountered the issue too , (3 or 4 days ago )

Trajectory ID: 63a99f8e-852a-4d2e-
Error: agent executor error: could not convert a single message before hitting truncation
(1) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2096
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| third_party/jetski/cortex/cascade_manager.go:2144
Wraps: (2) agent executor error
Wraps: (3) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).GetNumTokensSinceLastCheckpoint
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:550
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7.1
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:43
| google3/third_party/jetski/cortex/executors/executors.(*CascadeWrapper).ViewTrajectory
| third_party/jetski/cortex/executors/cascade_wrapper.go:258
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:33
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).executeLoop
| third_party/gemini_coder/framework/executor/executor.go:388
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:277
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2061
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| third_party/jetski/cortex/cascade_manager.go:2144
Wraps: (4) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).TrajectoryToChatMessagesFromNCheckpointsAgo
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:1135
| google3/third_party/jetski/cortex/chatconverters/chatconverters.(*TrajectoryChatConverter).GetNumTokensSinceLastCheckpoint
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:548
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7.1
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:43
| google3/third_party/jetski/cortex/executors/executors.(*CascadeWrapper).ViewTrajectory
| third_party/jetski/cortex/executors/cascade_wrapper.go:258
| google3/third_party/jetski/cortex/mixins/mixins.GetConversationalHooks.NewCheckpointHook.func7
| third_party/jetski/cortex/executors/posthooks/checkpoint_hook.go:33
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).executeLoop
| third_party/gemini_coder/framework/executor/executor.go:388
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:277
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2061
| […repeated from below…]
Wraps: (5) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/chatconverters/chatconverters.init
| third_party/jetski/cortex/chatconverters/trajectory_chat_converter.go:44
| runtime.doInit1
| third_party/go/gc/src/runtime/proc.go:8105
| runtime.doInit
| third_party/go/gc/src/runtime/proc.go:8072
| runtime.main
| third_party/go/gc/src/runtime/proc.go:258
| runtime.goexit
| third_party/go/gc/src/runtime/asm_arm64.s:1447
Wraps: (6) could not convert a single message before hitting truncation
Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *withstack.withStack (4) *withstack.withStack (5) *withstack.withStack (6) *errutil.leafError

Ashwin_Krishnan · March 17, 2026, 7:53pm

@Google_Google Guys, Absolulte inablity to use the platform for paying customers is extremely unacceptable. WHat is more frustrating is a complete lack of communication as well as no speedy remediation

Ashwin_Krishnan · March 23, 2026, 7:38am

Entering week 3 with no resolution from Google. guess I am basically being told to leave gemini as I am unable to use this.. The issue is with both antigravity as well as as their API server which pretty much renders using the IDE for any AI related work pretty much useless

Trajectory ID: 684c43ec-2047-4e91-ac9b-04a8923a678b
Error: agent executor error: stream reading error: unexpected EOF: stream reading error: unexpected EOF
(1) attached stack trace
– stack trace:
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2088
| […repeated from below…]
Wraps: (2) agent executor error
Wraps: (3) tags: map[stream_receive_count:4 streaming_duration:2m30.128848152s]
Wraps: (4) attached stack trace
– stack trace:
| google3/third_party/gemini_coder/framework/generator/generator.(*streamResponseHandler).processStream
| third_party/gemini_coder/framework/generator/stream_handler.go:353
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).attemptGenerate
| third_party/gemini_coder/framework/generator/planner_generator.go:454
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).generateWithAPIRetry
| third_party/gemini_coder/framework/generator/planner_generator.go:288
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).generateWithModelOutputRetry
| third_party/gemini_coder/framework/generator/planner_generator.go:156
| google3/third_party/gemini_coder/framework/generator/generator.(*PlannerGenerator).Generate
| third_party/gemini_coder/framework/generator/planner_generator.go:94
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).executeLoop
| third_party/gemini_coder/framework/executor/executor.go:355
| google3/third_party/gemini_coder/framework/executor/executor.(*Executor).Execute
| third_party/gemini_coder/framework/executor/executor.go:277
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func1
| third_party/jetski/cortex/cascade_manager.go:2053
| google3/third_party/jetski/cortex/cortex.(*CascadeManager).executeHelper.func2
| third_party/jetski/cortex/cascade_manager.go:2136
| runtime.goexit
| third_party/go/gc/src/runtime/asm_arm64.s:1447
Wraps: (5) stream reading error: unexpected EOF
Wraps: (6) stream reading error
Wraps: (7) unexpected EOF
Error types: (1) *withstack.withStack (2) *errutil.withPrefix (3) *go_utils.withTags (4) *withstack.withStack (5) *errutil.withPrefix (6) *fmt.wrapError (7) *errors.errorString

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"Fail to send" error consistently appearing in Antigravity

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