I’m experiencing SSL certificate errors across all my Vercel projects that use .vercel.app domains. This started happening a few hours ago and affects: Multiple projects (university-client-theta.vercel.app, university-server-fawn.vercel.app, and others) Multiple devices (different laptops and PCs) …

All of the sudden, my Vercel projects is having a net::ERR_CERT_AUTHORITY_INVALID errors. Error: net::ERR_CERT_AUTHORITY_INVALID Can someone assist me on this issue? Thanks! [image]

Do you have a specific subdomain I can check?

This is also happening to all my deployments on .vercel.app domains.

same for me as well. churchservicemanagementui.vercel.app

I am having the same error as well. It just also restarted yesterday

NET::ERR_CERT_AUTHORITY_INVALID error, how to fix this? - Google Chrome... Looks like it’s related to this? UPDATE: Saw a related thread, I’ll merge this.

Your domains are working for me (I’m in the UK), I wonder if this is related to this incident . Where are you all trying to connect from?

I think I figured out the problem. I’m based in the Philippines, and the government has recently been cracking down on some illegal gambling websites. It seems that Vercel domains may have been mistakenly flagged or affected by this block (not entirely sure, but that’s what it looks like). What wor…

Vercel net::ERR_CERT_AUTHORITY_INVALID error on .vercel.app domains

Help

pawlean (Pauline P. Narvas) March 11, 2026, 12:27pm 17

Thanks for sharing this, @stiffynavales!

I’ll share with our team internally to see what we can do. In the meantime, if everyone else could try what worked for @stiffynavales that’d be great:

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Vercel net::ERR_CERT_AUTHORITY_INVALID error on .vercel.app domains

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