Ah… I am having the same problem and so it’ s likely a broader issue and not a setting (or some strange token issue). I posted the following in the Gemini forum and someone suggested I post it this forum. Sounds like this is a problem that started a couple of days ago and affecting more than just me! I have some old sessions that still work. See my scenario below and let me know if there is a pattern.
I’m a Google AI Pro subscriber and am experiencing a recent issue in AI Studio where the Run button and Ctrl + Enter functionality have been disabled in 3 out of my 9 active sessions.
Details
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The affected sessions are part of a 4-part series following a consistent naming convention (e.g., Phase 1, Phase 2, Phase 3, etc.).
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The most recent session in the series (Phase 3) still functions normally.
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All unrelated sessions outside of this series are also working as expected.
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Token usage is well below the 1 million-token limit:
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Session 1: ~600 k tokens
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Session 2: ~500 k tokens
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Session 3: ~33 k tokens
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Troubleshooting Steps Attempted
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Cleared browser cache and cookies
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Tried multiple browsers (Chrome, Edge)
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Tested in Incognito/Private mode
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Submitted feedback through the in-app feedback option (no response yet)
Summary
The issue appears to be isolated to a subset of related sessions. It’s unclear whether this is a token-count, naming convention, or session-state issue.
Has anyone else encountered similar behavior, or does anyone know of a workaround or method to re-enable prompt execution in affected sessions?
Thank you in advance for any guidance.