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MarekMularczyk
Community Expert
Community Expert
January 13, 2026
Question

After Effects doesn't start anymore - Unknown BIB Error

  • January 13, 2026
  • 2 replies
  • 195 views

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.

2 replies

ToolfarmJP
Community Expert
Community Expert
January 15, 2026

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

 

MarekMularczyk
Community Expert
Community Expert
January 15, 2026

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

  

Adobe Community ExpertAdobe Certified Professional
MarekMularczyk
Community Expert
Community Expert
January 14, 2026

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

 

Adobe Community ExpertAdobe Certified Professional