changes in configuration are not taking effect
Installation and Configuration
that error is unrelated to increasing upload limit, but it should be fixed either by adding your credentials or by disabling the module.
The docs for increasing phps upload limit are here:
Docs: "HowTo increase PHPs Upload Limit"
https://www.jamroom.net/the-jamroom-network/documentation/howto/748/howto-increasing-phps-upload-limit
If they dont work, contact your hosting company for help getting them activated.