After Effects doesn't start anymore - Unknown BIB Error

When trying to open After Effects, today suddenly it doesn't open at all.. It comes with this error message:

Screenshot 2026-01-13 220341.png

And then, after clicking OK it comes with this:

Screenshot 2026-01-13 220603.png

and shurs down.

Community Expert

If the error is related to the folder permission, you try to use the command line to launch After Effects.

Windows: Run as administrator (Select AfterFX.exe and right-click it)

Mac: sudo open Applications/Adobe\ After\ Effects\ 2025/Adobe\ After\ Effects\ 2025.app
via Terminal.app

Author

Community Expert

I tried using "Run as administrator". The same error...

Adobe Community ExpertAdobe Certified Professional

Community Expert

See here:

Author

Community Expert

I tried clearing font cash already. Didn't work...

Adobe Community ExpertAdobe Certified Professional

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