That’s an SMB signing issue.
Try this: Windows 11 not finding my Antipodes music server - #10 by MarkCole
If that doesn’t work, then maybe try the following. I’ve yet to see anyone need to do this for Antipodes yet though, but one never knows what Microsoft might be changing after an update: How to fix SMB Signing error to access NAS on Windows 11 24H2 - Pureinfotech