Wii U Pro Controller refuses to pair after installing latest updates

Just yesterday my controller worked perfectly fine. Today, I installed some updates, and after them my controller still worked, but the LEDs were all blinking and it didn’t just turn on one LED at all. I decided to re-pair it, but pairing fails every time I try it. Does anyone know what is hapenning? Bluez version 5.73-3 is installed, together with kf5-bluez-qt version 5.115.0-1. Thank you for your help in advance!