Claude Opus 4.6 errors: server-side, IDE-side, or both?

Frequent ‘Agent terminated due to error’, when using Claude Opus 4.6 in latest Google Antigravity ver. 1.16.5 - no extraordinary usage, context size or prompt length!
Are these to be attributed to server side errors (due to availability), as other users reported, or as Claude self-reports that these are IDE side errors (bug)?