Backup does not work in the AEPIM

[marmegint]

Greetings!

For a few weeks, neither manual nor automatic backup has been working.
Backup starts, but the application restarts itself and nothing is saved.

Two 0-bit files are created:
d6782df6527e81f544f140a4a06097f3.hash
EpimCalendar.json.encr

I tried not to save all modules.
In the data to be saved, I first unchecked the Calendar and the save was successful.
I thought there might be something wrong with the calendar entries.
(Although the program allows you to enter and save data, why would it be wrong and cause problems with the backup?!)

Then the backup didn't work again.

I deleted the posts from the last couple of weeks, but there was no change.

I deleted the database and reloaded an earlier one that I managed to save.
The backup worked right away, but when I entered anything, it was not working again.

I deleted two entries in the Tasks and it was working again, but after creating a few entries it didn't work again.

I reinstalled AEPIM, but that didn't solve the problem either.

I don't know what to delete to fix it or what activity would definitely reproduce the error.

The backup is not working right now.

What can I do, what could be the error?

AEPIM version: 6.0.17
Android version: 9
Build number: 55.0.A.10.26
Phone: Sony, Xperia 1


Thank you.

[admin]

Please also try disabling backup encryption to see if that has any effect.

[marmegint]

I disabled encryption and this is how the backup works.
I tried this several times and it always worked (but only this way).

[admin]

Thanks for the update, we'll look into this issue.