This issue is caused by the latest Flash Player 22.214.171.124 update.
There is already an issue in Flash player issue tracker.
I recommend you to vote for that issue to make Adobe Flash player team fix it ASAP.
This issue is known to us.
We are investigating the problem.We will provide the fix shortly.
Guys from iSpring Solutions have managed to develop a tool that fixes presentations with broken Flash objects
It seems that they also provide a iSpring Suite product with functionality similar to Adobe Presenter
Great. I am glad to hear that. Will you then put that fix in the Flash 19 version for reload, or apply the fix to it once it is installed?
The issue of publishing the project is fixed now.
To fix the issue, just update the Flash ActiveX to the version 126.96.36.199 and you will be able to publish again.
To update the Flash ActiveX go to this link from Internet Explorer : Adobe Flash Player Install for all versions
To recover the old projects which got corrupted you can go through this article and recover all your old projects : https://helpx.adobe.com/presenter/kb/projects-in-presenter-get-corrupted.html
This solution worked for me! Thank you!