I am unable to use Bridge. Infinite loop with pop up warning about deleted collection target folder.

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I have been unable to use Bridge for days and Adobe Support has been completely unhelpful. When I get connected through chat, the rep says they are going to look up information in my account and after a while, I get disconnected. Sometimes it's the same rep. They shouldn't have to look up my info when they just looked it up! Why am I paying for a software subscription if I can't use it?

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Here is what happens:

I open Bridge and a pop-up window appears (see attached) telling me that a collection target folder cannot be found. I click "OK" and the window disappears and reappears quickly. I am unable to get past the pop-up to use the app. I can't even close the app. I have to go to Task Manager in Windows and end the task.

Here is what I have tried:

1. I uninstalled and reinstalled the app, preserving my preferences.
2. I uninstalled and reinstalled the app, deleting my preferences, then letting Bridge search for and import them.
3. I uninstalled and reinstalled the app, deleting my preferences.

Next I was going to try installing older versions of the app, but I thought I would post here first.

Thanks for your help.