Problem Description:
I can log in successfully and the "Test" function works fine (the simulation preview loads normally).
However, when I click the "Save" or "Publish" button, an error pops up: "The translation utility experienced an error. Failed to fetch." (as shown in the Fig on the right)

This error occurs every time I try to save or publish.
What I have tried:
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Allowed cookies and JavaScript from phet.colorado.edu in my browser.
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Disabled all ad-blocker and privacy extensions.
I logged into my PhET account and was able to reproduce:

I logged into my PhET account and was able to reproduce:
