Issue Backup invalid input parameters in '--make-dump', attribute 'include-server-settings' is not allowed

[frundaa]

Server operating system version

Debian 12

Plesk version and microupdate number

18.0.74 Update 3

Dear Pleskies,

after update to 18.0.74 (Debian 10) following error occurs:

Fehler: Der Backupvorgang ist fehlgeschlagen: Invalid input parameters in '--make-dump' command: Error 1: :1:0:ERROR:SCHEMASV:SCHEMAV_CVC_COMPLEX_TYPE_3_2_1: Element 'backup-options', attribute 'include-server-settings': The attribute 'include-server-settings' is not allowed.

I have tried

plesk repair -all

and

plesk repair fs -verbose

but does not fix this issue.

Log shows some errors:

Some files packaged by Plesk have incorrect permissions ........... [ERROR]
To see more details, run the command in the verbose mode: plesk repair fs -verbose
Repairing incorrect permissions ................................. [2026-01-01 19:12:31.305] 130109:6956b90b78240 ERR [util_exec] proc_close() failed ['/opt/psa/admin/bin/fsmng' '--fix-plesk-packages'] with exit code [1]
[FAILED]
- fsmng failed: ERROR: Unable to update packages index: Command
'/usr/bin/apt-get update -o
Dir::Etc::sourcelist=/tmp/tmpk55ib069' returned non-zero exit
status 100.

How can the issue be solved. Backup at the moment not possible and a migration to a new server (Debian 12) not possible!