You are currently working on UAT 

Planned For Future Release

This feature will be available once we have integrated the next generation TM engine in WorldServer, planned for 2019.

It is already possible for translators to benefit from this feature if they download a WSXZ kit and use local project TMs.

upLIFT should be compatible with server-based TMs

upLIFT Fragment Recall and upLIFT Fuzzy Repair are still not available for server-based Translation Memories in SDL Trados Studio 2017.
Carla Galvao