I don't know the answer to your question but just had comment on the irony of...
Needing a computer engineering degree appears to be a prerequisite for working with the Adobe apps.
There was a time when that was actually true...or very close to true anyway.
Do you have any script UI panels open in your AE interface?
No script UI panels. Again, these projects can be opened either from within AE or even from Windows Explorer if AE is already open and running. It does appear that the error comes only for projects that were created in an earlier version of AE and have been converted. However I also have many other converted projects that open without error.
I have occasionally gotten this error too. I haven't really troubleshot (troubleshooted?) it enough to figure out the cause since it's a harmless message, but I am getting a bit curious about it. Maybe I'll poke at it a bit this weekend.
Sorry for this issue. Did you ever find a solution? Please let us know if our experts’ advice helped you or if you still need help.
I have the same issue with a lot of projects, but not all of my projects. And I do have ScriptUI Panels open. Still no solution?
Has an answer ever been found for this... had this happen today for the 1st time... and it seems intermittent...
AE version 2018... hopefully there will be an update that resolves this...
happened with No ScriptUI Panels open... and when I did open them... so I would think this isn't the issue...
Have a great evening...
Also having this issue after a about a half hour into a project I will get this warning dialog when I try to use a script.
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I faced the same issue recently ...
It means that you installed a script which runs when you open After Effects .in some cases when you install after effects at run time one or more dialog boxes appear . The image is what I faced whenever open After Effects.
The simple thing I do was like the above image. Just choose "Never Again" and hit OK.
Now Script can run at After Effects runtime without any modal dialog at line 0.