InDesign 2021 crashing on macOS Big Sur

I had this issue from Dec 13-14, 2021.  One particular InDesign file kept crashing.  I did the following:  Save As - to eliminate file bloat. (File Bloat is the condition whereby a file size grows everytime you make changes to the file).  File Rebuild - select all and pasted into a new doc.  These steps did not work.  But then I noticed this file had a pasted Adobe Illustrator paths in it.  Note:  I did not drag the Illustrator file into InDesign, rather I copied (Command C) from Illustrator and pasted (Command V) into InDesign.  The advantage of this method is that you could directly edit the pasted art in InDesign rather than going back to Adobe Illustrator because you are essentially pasting paths.  I had two files with Pasted AI paths, one was very complicated, multi-layered, multi effects, multi tranparencies and the other was just simple shape.  I noticed the problem file from Dec 13-14 had the complex AI paths and that crashed after 2 minutes of work.  The other InDesign file with the simpler AI path crashed but after 20 minutes of work.  So I went back the complex AI file, created a PDF and then placed that file in InDesign.  This solved the problem.  I didn't try placing the .ai file.  So in my particular case, directly pasted AI paths were the culprit. 

Hi everyone,

We're so sorry to hear about this trouble. I understand that it's frustrating. I would request if you could submit the crash report by following the steps suggested here (https://helpx.adobe.com/in/indesign/kb/submit-crash-reports.html).
While submitting the crash report, please use the same email address, with which you are signed in on this community. This will help us find the crash report and help accordingly. 

Once done, please try the steps suggested on this page ( https://community.adobe.com/t5/indesign/resolve-slow-performance-and-unexpected-behavior-of-indesign/td-p/11487287?page=1 ) and share your observations with us. 

We’re here to help, just need more info.   

Regards,

Srishti

Every year we hear the same song when Apple release its new OS.
Always check the compatibility of your applications before upgrading the OS!

==> https://helpx.adobe.com/download-install/kb/macos-big-sur.html

well, I scrolled down to a slightly different issue, but tried this, it worked, I am so very relieved! A Big thank you to Derek Cross!!!:

Tty resetting your InDesign preferences:

1) Close InDesign
2) Double click on Adobe InDesign's icon to launch it
3) QUICKLY hold down Ctrl+Alt+Shift. (for Windows) or CTL+OPT+CMD+Shift (for Mac OS X)
4) When a dialog appears, ask you “Delete InDesign Preference Files?” Click Yes.

(If you don't see the question do it again.)