I got an ingame message telling me to install the configured mod to use the ui for the JEI mod. Although after installing the configured mod i still get an ingame message telling me to install it when i try to configure JEI through the ui.

This is fixed in an upcoming update to JEI. The latest release available on CurseForge does not have the fix yet.
Same issue reported on JEI: mezz/JustEnoughItems#2538