Description:
I encountered the problem on QNAP TS-433eU, but have not tested with any other NAS. It happens only with LibreOffice products. I reproduced it on several PCs in the local network.
When trying to save changes to a file if some of the directory names in the path contain % or # the following message is displayed:
"
Error saving the document *name of document*:
Object not accessible.
The object cannot be accessed
due to insufficient user rights.
"
and changes cannot be saved to the file.

Steps to Reproduce:
1. Create a folder on NAS with % or # in the name (e.g., "Project#1" or "Data%Backup")
2. Open an existing document in LibreOffice [specify which application - Writer/Calc/etc.]
3. Make any change to the document
4. Attempt to save (Ctrl+S or File > Save)
5. Error message appears

Actual Results:
Error message appears and document cannot be saved

Expected Results:
Document should save successfully


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 25.8.3.2 (X86_64)
Build ID: 8ca8d55c161d602844f5428fa4b58097424e324e
CPU threads: 8; OS: Windows 11 X86_64 (build 26200); UI render: default; VCL: win
Locale: en-US (en_US); UI: en-US
Calc: CL threaded

Applications affected: Writer, Calc, Draw, Impress, Math
Workarounds: Saving to local drive, or renaming folder to remove % or # works