Captive portal failing to load

When I try to connect to the public network at my work, the captive portal launches but fails to load. I've been having the issue for about a year; however, every once in a while it will load successfully so I can input my login credentials. I haven't been able to figure out if it is anything I'm doing to create those successful attempts. I've tried rebooting, forgetting the network, or starting in safe mode, but none seem to make any impact.

I have had this issue both before and after switching from Big Sur to Monterey.

The screenshot shows the error message that shows after the captive portal has failed to load and timed out.

Is there something preventing it from loading I can change?