External Mount Storage Failed

Hey Guys,

I have a problem with the apps external_storage in NC
NC Version: 18.0.3
External_storage: 1.9.0

COnfiguration on External_Storage:

Host: ip address (i have tried also with \ip address but nothing change)
Name of folder
SubFolder: blank
Domain: blank
Username: Domain\Username (of domain)
PAssword: Compiled Password

I have a Debian VM and i have already installed and updated smbclient, php-smbclient and core-utils.
But in specified moment i have a red square in every external mount on my installation.

It’s not everytime but, in some random moment.

The error that can i view in logs is :“Icewind\SMB\Exception\ForbiddenException: Invalid request for / (ForbiddenException)”.

I have modified already in etc/samba/smb.conf the max client is SMB3 but the strange thing is that only in a few moment (like 3-4 months) the red squares appears.

Can you help me? Thank you so much