Trouble accessing remote resources through Clientless VPN

We're having issues accessing the RDP or SSH functionality of PMP when logging in through our clientless VPN. The website URL redirects work flawlessly. In looking through the log files, I did find an sshd.txt that is claiming potential CSRF attack (See below) and was wondering if this could be what's causing the disconnect, or if there's somewhere else I should look to see what's interfering.

23 Aug 2021 19:43:01,325 [/dwr/call/plaincall/__System.checkHeartbeat.dwr-1629769381325_###_https-jsse-nio2-443-exec-14] ERROR org.directwebremoting.dwrp.BaseDwrpHandler - A request has been denied as a potential CSRF attack. This security check is performed as DWR's crossDomainSessionSecurity setting is active. Read more in the DWR documentation.