I published customization in a production tenant, assuming it would add the new screens to the test tenant also. It did not, so attempted to publish in test tenant. I got the error below:

I then unpublished in the first tenant, then tried publishing in test. Same error.
I found this: acumatica - Error when attempting to Publish Customizations (Cannot access the uploaded file) - Stack Overflow
I located the missing file within the customization, but I don’t understand what the above post means by “remove file link reference”. Nothing I’ve tried works. I tried deleting the file itself and re-uploading, but it says invalid file type.
Then I found this: How to resolve the 'Cannot access the uploaded file' error on publishing a customization project | Community (acumatica.com)
Tried and didn’t work. I’m sure the missing file I found is the problem, but I can’t figure out how to fix it. Anyone know?