No second account in android app

After 2 day troubles to format a sd cards with nextcloud on it i decide to take a new card with 8gig and install nextcloud on is everything is working
3 members make incl ncp
Ssd 128gb on usb

But when i login into my android app everything is good.
Then i want to make a second account i lost the first one
So i made again the first one i lost the second one
This is happening on my lenovotab and my motorola 5g
Both where working good but is update both to the latest app from the playstore eg juli 9

Is there something wrong?

Admin or moderator can you delete this topic problem solved i think i was to fast with making accounts

Aka Gerrit