Fix file saving issues on the hosting with the datamapper

[VincentvanMedenbach]

Fix the unresolved issues for saving configurations and generating XSLT in the datamapper's backend. The error is not currently known but most likely has something to do with the differences between the cloudservice and the localservice.

Generating a XSLT returns a 404 message with no message,
saving a configuration gives a 500 error:
error
:
"Internal Server Error"
path
:
"/api/datamapper/Test1234/configuration"
status
:
500
timestamp
:
"2026-03-11T07:42:25.678Z"