Getting ERROR Signature verification failed for extension com.unscreen

Question

Hey there,

we got a client report that our latest version 1.2.0 of the com.unscreen plugin is not working on Windows in latest versions of either After Effects and Premiere Pro. I tried and and got this in the CEP logs:

ERROR Signature verification failed for extension com.unscreen

The plugin works perfectly on mac OS, though. I verified the signature of the ZXP:

C:\Users\brewm>C:\Users\brewm\Downloads\ZXPSignCmd.exe -verify C:\Users\brewm\Downloads\com.unscreen-1631701698.zxp -certinfo
*********** Certificate Information ***********
CN: unscreen.com
OU:
DN: /C=AT/ST=Vienna/O=Kaleido AI GmbH/CN=unscreen.com
OS Trusted: false
Revoked: false
Timestamp: Unverifiable
Signing Certificate: Valid (from 2021-09-14 until 2032-12-01)
***********************************************
Signature verified successfully

Any clue what could be the issue and what we can do?

Andreas@Kaleido · Answer

So after no help at all from Adobe I invested again some time into this. I succeeded getting it to run on Windows when I ran the ZXPSignCmd command on windows with a different TSA url - the mac version did not complain but the windows version did. The build with TSA URL http://timestamp.digicert.com then also worked on Windows.

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