We have noticed an issue with the new Mikrotik RouterOS ver 6.45.1. The issue occurs when performing authentication with radius, and the radius is responding with the error “radius not responding”.
Encapto highly suggests not to upgrade to version 6.45.1. If you have already upgraded please downgrade to the latest long term version. The long term version we recommended is 6.47.10 based on our own in-house testing.
Please note Mikorik has acknowledged this issue (as below screenshot). If you would like more details from the Mikrotik forum refer to link - Mikrotik v6.45.1 [stable] is released.