FTR 5.5.5 cartridge will not work with FMS 22.214.171.124.
There is a separate release of FTR 126.96.36.199 that works with FMS 188.8.131.52
Download the FTR 184.108.40.206 cart found in the below link.
Message when trying to activate the FTR 5.5.5 cartridge
Enabling the following cartridges will cause currently enabled incompatible/superseded cartridges to be disabled. Are you sure you want to proceed?