Cannot access folders

Hi everyone, and happy new year.

Today I tried to open some folders on my NAS drive (SMB share on GUI Ubuntu) and I get Permission denied, then they disappear from folder structure.

ls command in terminal is showing them in red color. But when i try to reach them, I get: cannot access 'my folder' permission denied

The same happens with random folders on the same drive.

Edit: This only happens to my smb shared folders.

But is it the same user (the only one) as usual. And inaccessible folder are random. And everything was working few weeks ago.

ls -l command on disk directly shows the following permissions: drwx--S---

Quote from macom

Show the complete output

drwx--S--- 4 99 users 4096 nov 24 16:50 'Myfolder'

That worked thx.

I forgot that I have already installed the plugin.

But still don't know what caused the problem