How to reverse to an auto-saved version?

Yesterday I was working on a document in OnlyOffice in Chrome for hours. Everything went fine, but when I shared it with a colleague and reopend the file, loading stopped at 93%. This morning I still got this error and so did someone else. When I copy the file and paste it elsewhere I can open the file, but the very first version. So hours of work aren’t included.
Is it possible to go back to one of the auto-saved versions?

We’re using NextCloud 18.0.4 on this server:

100 GB disk, 87 GB free
2 Cpu
Mysql 10.3.22
Php 7.3.14