Hi everyone
I wanted to share an issue I faced today with the Vercel v0 preview environment that was quite confusing and stressful, especially for a project that was already stable.
I started getting this error in the v0 preview:
Failed to load “@supabase/ssr” from blob:*
See network log for details.
The important part is how this behaved
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This error did not exist earlier
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It appeared after a new preview/runtime change
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But it also started appearing in older deployments that were previously working perfectly
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Even restoring an older “known-good” version did not help
From a user perspective, this made it very hard to understand whether:
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My code had broken, or
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The preview/runtime environment had changed underneath all versions
It felt like all preview versions were retroactively affected, which removed the safety net of rolling back to a stable deployment