Data File - can't not finish loading i can't open data file

What edition of Manager (Server, Desktop, Cloud) are you using?
What version of Manager are you using?
What Operating System are you using?

Can you open or create other businesses?

I’m using Desktop edition
I’m using 23.7.3.860 Version
I’m using Windows 10
yes I can open or create other businesses

Seems as if your file might be corrupt - do you have a backup you can use?

You are a good number of versions behind - is it possible that the business was opened by a later version of Manager?

I have last backup by dated today 17/9/2023 but same issue
but old backup dated (10/9/2023) working