Hello @Pancake1 and welcome to the forum!
If you know how to repair ZIP-Files and have tools for that task, you can try it on your own to rescue your file.
Please do this only on a backup copy of the damaged file, but never with the only copy of the file you still have!
If you do not know how to do it, or do not have the tools for that, you can upload your file to a service like Dropbox, Google Drive, OneDrive, or similar, or, in case you donāt use such services, you can upload it to Ufile.io, there you do not need an account and can share files up to 5GB in size, and these files will be automatically deleted 30 days after you uploaded them.
You can upload the link to your file in a reply here in this topic, or, if the file should not be made public, send that link in a PM to me. To PM me, click on my avatar and in the opening dialog click on the blue button Message, then insert the link into the editor.
But anyway, I believe it would be a good idea to make your file available, at least for me. Because in between I have a large collection of different tools for ZIP-Repair, and although all these tools try to do the same thing, they seem to go different ways, because not always every tool is able to restore a (restorable) file, and not always the same tools can recover a file, so under the hood they obviously work different.
Furthermore, it seems that you are another user who, probably because of assuming instead of knowing (here I could be wrong) how Kritaās āAutosavingā really works and for what that is meant, could have lost a lot of work (okay, maybe there is something that can be rescued). It is probably not the baddest idea to read up the manual chapter about Saving, AutoSave and Backup Files, to understand how that works and for what it is made.
For the future, you should consider creating a habit of constantly making backup copies of your work like I describe it in these topics, for example:
Or in this one from just yesterday that has some similarities to your issue:
Michelist