I've edited the OP to clarify the grammar. I'm able to access the root of the share.
It's possible you missed what I mentioned was working:
This computer was able to access the folders 3-4 weeks ago (last time I went in). Based on this, I can only conclude there's some weird issue with this computer that happened within the past few weeks.
I've spent 5 hours scouring the internet looking for a solution. I've had 3 other people review it with me and we're all stumped.
I'm able to view the folders within the root *of the* share but opening any of the folders yields "You do not have permission to access \\IP\Folder. Contact administrator to request access." (see attached for example)
The following did not work (Edit: Added more)
new user on Unraid (with access R/W to all shares in question)
new local user on same machine on Windows 10
Tried Docker Safe New Perms
Created a new share set to public (imaged/attached with error)
In windows, enabled insecure guest logins
Checked every log I could find in unRaid
Restarted unRaid
Restarted Array
Disabled then re-nabled SMB
Fix Common Problems shows nothing wrong
Removed all "Windows Credentials" from Credential Manager (unRaid server was not there though)
Enabled SMB 1.0/CIFS File Sharing Support & SMB Direct from Windows Features
Note: Set smb.conf with log level = 3 (and 1) and not obtaining a file to review (Maybe doing it incorrectly?)
The following did work (Edit: Added more)
MacOS Laptop able to connect with same login credentials
Windows 10 VM on unRaid able to connect with same login credentials
Windows 10 Laptop able to connect with same Login credentials and same windows credentials