Sorry to be delayed in getting back to you. Have you attempted changing the env.properties associated with CORS? I believe the relevant section of the code for that part of the configuration happens here: https://github.com/infiniteautomation/ma-core-public/blob/main/Core/src/com/serotonin/m2m2/web/mvc/spring/MangoWebSocketConfiguration.java#L77
The console on the left is with the env.properties
while the console on the right has the properties
Hope that's helpful!