Error in (x)ubuntu release 24.04

I receive the following error message in manager (v24.5.31.1605) when i writing a mutation.

Is this happening always or just sometime?

Always with xbuntu and ubuntu version 24.04 and on difference computers.

I have now discovered that if I put my data in my home directory instead of my NAS, no error message appears.
So there is something wrong between (X)ubuntu 24.04 and the NAS.