You can get a refund!

Considering it’s confirmed that Antigravity is ditched by Google and is a product that doesn’t want to honor contracts (cutting limits, botching servers, locking accounts, soft-bans, etc.), I assume a lot of people have cancelled their subscription and moved on.

Well, you can get a refund for your unused days! . Take it and gift your loved ones!
https://www.reddit.com/r/google_antigravity/comments/1simhul/i_requested_a_refund_for_my_ultra_plan_and_google/

it can actually be fixed independently by setting access permissions in Google Cloud Storage. However, if you feel that this system is not as reliable as other users have complained about, you should immediately secure your payment settings.

Problem: the Input file is not available.
Cause: system Batch API cannot read your input file

  1. Step-By-Step Solution
    ​Fix File permissions: make sure your service account has Storage Object Viewer access on the bucket where you store the JSONL file.
    ​Verify Path: make sure the address IS gs:/ / bucket-name / file.jsonl is correct and no typos.
    ​Resubmit: once the permissions are fixed, you must create a new Batch Job. Jobs that are already in FAILED status cannot be repeated automatically.
    ​3. About Refund Complaints
    ​The community's post showed other users ' frustration with the "Antigravity" service. If you feel that this technical failure continues and is harming your quota/funds:
    ​File a Support Ticket: don't just follow the advice in the forums. Use the official path through Google Cloud Console > Support so that the technical team can review Your job ID (…q6nxw) and compensate if the error is on the server side.
    ​Cancel if necessary: if you find the service unstable for your production needs, consider canceling your subscription through your Google account billing settings to avoid future charges.

​About Refund Complaints
​The community’s post showed other users ’ frustration with the “Antigravity” service. If you feel that this technical failure continues and is harming your quota/funds:
​File a Support Ticket: don’t just follow the advice in the forums. Use the official path through Google Cloud Console > Support so that the technical team can review Your job ID (…q6nxw) and compensate if the error is on the server side.