Data Encryption – Enable or Disable over the air OSBRiDGE proprietary data Encryption here. This encryption scheme works only between compatible OSBRiDGE devices.
Encryption – Please select generic WLAN encryption scheme: WEP, WPA-PSK TKIP or WPA-PSK CCMP (AES).
So you see that they use some proprietary protocol to encrypt data. This is to block any other brand devices from connecting. If this mode is enabled on the AP, the MikroTik client will not be able to connect. You need to replace the AP also, or at least turn off this proprietary mode.