No messages in E-shop after migration from J4 to J5

I migrated from Joomla 4 to Joomla 5, and everything looked fine at first glance, but all messages, exept "Admin Failure Notification Email' is missing. As fare as I can see, this is only thing not right. In a local xampp back up, I tried to install Eshop 4.0.0 again, but this doesn't add the messages. They are still missing. I tried to uninstall Eshop, and install E-shop again, but then all my customer data disappeared. This is on a local backup - is there anything I can do, to get this up and going again, on my online site? Can I add the messages manually? which folder are they located in, I cant find them in my Public-html folder. Any suggestions on what to do? I cant seem to add them from backend joomla either.
Or can I save my customer data in some way, uninstall E-shop, install E-shop, and then add my saved customer data? If yes, how do I do this?
 

I found the reason: two tables in the database, was not correct: eshop_messages and eshop_messagedetails - I think its on me, I think I did some changes long time ago, dont remember what and why. But buttom of the matter, after deleting these, and importing these to tables, from a clean local installation, with just newest joomla and newest eshop, everything is up and going again.
From another local restoration of an older backup, I could recover my changes to the mail-templates in backend joomla.

When I found out how to do it, it didnt take long to fix, but it took some struggles, to get to the why.
This topic can be closed, unless anyone in same situation, has any questions,