[CoursePress Pro] Unable to save units in Coursepress Pro

When trying to edit units in an existing and published course, I'm getting error messages, and units will not save. I have tried many times over many days.

The following messages appear when I click the [Save whole units] button: "Unit is saving now."

Then about 30 seconds later at the top of the page I see:

"Connection lost. Saving has been disabled until you’re reconnected."

"We’re backing up this post in your browser, just in case."

Then back down near the button about a minute later, I get:

"Something went wrong. Unit was not saved!"

I have debug set to TRUE since June 12 and see various errors in the log. Today have enabled support access, but please be aware this is my PRODUCTION ENVIRONMENT with many students active. Please advise the best way to send a txt file of the log.