PROPFIND Reply is not XML Formatted - help 2024

Hello!
Over the past 2 weeks, our nextcloud client has become very glitchy.
Namely: many users in random order with random folders began to get the synchronization error “PROPFIND Reply is not XML Formatted”
How can I fix it?
The register and folder paths are completely different.
We used different versions. Even on the recommendation from a similar topic, they installed 3.14.1, but it didn’t help

in old topics there is not much information for the client-user, more often for linux servers