Since the update for InDesign 2020 to 2021 there are problems with InDesign constantly. Lots of errors, documents get damaged and most of my work gets lost. So I am back tot InDesign 2020. So much better!
So sorry to hear about the trouble you are facing with InDesign's latest version. There are multiple factors that can lead to file corruption, however, we can take a look and see if the file can be repaired.
I would request if you could share a few more details in your free time, we'll be hapy to help.
I just updated Indesign and I am hugely frustarted and disappointed. First of all, all the space bar quick keys have been eliminated. Why? It's terrible. I have been working in InDesign since the 90's and this is, by far, the worst decision Adobe has made in a long time. No longer can you access the hand move tool from the arrow. No longer can you use shift to lock scale objects proportionately. No longer can you hold option space bar to zoom in and out. And that is only what I have just noticed this morning. Second, it keeps crashing. Adobe, I would love some rationale or some tips as to how to resolve this. Really disappointing and also huge waste of time.