Redmine

Hey, folks;

I am attempting to move my current redmine implementation to a new server and upgrade the version from v4.1.1.2 to v5.0.5. I've already done my DEV server and it is working great. However, when I setup the production, I see an error upon logging in:

Invalid form authenticity token

in the production.log, I see the following:

I, [2023-09-08T10:26:11.153362 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] Started POST "/login" for 10.253.0.14 at 2023-09-08 10:26:11 -0500
I, [2023-09-08T10:26:11.154336 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] Processing by AccountController#login as HTML
I, [2023-09-08T10:26:11.154433 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802]   Parameters: {"utf8"=>"✓", "authenticity_token"=>"<my token>", "back_url"=>"/", "username"=>"user@domain.com", "password"=>"[FILTERED]", "login"=>"Login"}
W, [2023-09-08T10:26:11.155051 #34411]  WARN -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] Can't verify CSRF token authenticity.
E, [2023-09-08T10:26:11.155205 #34411] ERROR -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] ActionController::InvalidAuthenticityToken: ActionController::InvalidAuthenticityToken
I, [2023-09-08T10:26:11.160808 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802]   Rendered common/error.html.erb within layouts/base (Duration: 0.6ms | Allocations: 257)
I, [2023-09-08T10:26:11.167277 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802]   Rendered layout layouts/base.html.erb (Duration: 7.1ms | Allocations: 4635)
I, [2023-09-08T10:26:11.167474 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] Filter chain halted as :verify_authenticity_token rendered or redirected
I, [2023-09-08T10:26:11.167615 #34411]  INFO -- : [5cca5ca5-9b07-4416-88a5-2110371c4802] Completed 422 Unprocessable Entity in 13ms (Views: 9.1ms | ActiveRecord: 0.9ms | Allocations: 6519)

I've been around Google and find this error with other users, but always for very old versions of Redmine and none of the solutions listed are either appropriate for my version or just don't work. What causes this issue? How do I stop it?

I'm running the following server:

Ubuntu 22.04