Calibre can't read booklist from device

Hello everyone,

I've been having issues with my Kobo Aura H2O e-reader when connecting with Calibre.

First I got an error message that I couldn't remove books from the device ("Your Kobo is running an updated firmware/database version. As calibre does not know about this updated firmware, database editing is disabled, to prevent corruption....")

It's a simular message as in the following thread:
https://www.mobileread.com/forums/sh...d.php?t=295238

When I first got the error, I didn't write it down. I can't give the device database and firmware version, because the device won't connect anymore.

I chose to override the check, but now calibre can't read the booklist from my device. I don't get an error, but Calibre will continue to try to read the booklist. I gave up after about an hour.

I tried updating Calibre, but that didn't help. I now use version 4.19.0
I tried using the repair option for calibre, but that didn't help either.

Any tips or ideas?

Thanks,
Josette