How to decrypt my files

[Jimmi]

Almost all my files are suddenly encrypted both on my mobile and desktop.

Server is ‘mark.nl.tab.digital’ - using browser Firefox on laptop. On Mobile using Nextcloud app.

How can I decrypt the files?
Attaching a screenshot as a example.

[geoW]

Seems, you are not alone.
https://help.nextcloud.com/t/my-files-got-encrypted-even-though-i-didnt-turn-encryption-on/221596/9?u=geow