If you're using a custom hotkey set, it's likely that the hotkey set was not updated for the squad missions. You'll need to grab them from vanilla. Paste this into the end of your DF/data/init/interface.txt file:
[BIND:CIV_RAID:REPEAT_NOT]
[KEY:r]
[BIND:CIV_CENTER_ON_FORT:REPEAT_NOT]
[KEY:y]
[BIND:CIV_HOLDINGS:REPEAT_NOT]
[KEY:h]
[BIND:CIV_MAP_LEGEND:REPEAT_NOT]
[KEY:l]
[BIND:CIV_REMOVE_MISSION:REPEAT_NOT]
[KEY:x]
[BIND:CIV_RESCUE:REPEAT_NOT]
[KEY:r]
[BIND:CIV_RECOVER:REPEAT_NOT]
[KEY:r]
[BIND:CIV_WORLD:REPEAT_NOT]
[KEY:w]
[BIND:CIV_MISSIONS:REPEAT_NOT]
[KEY:m]
[BIND:CIV_MISSION_DETAILS:REPEAT_NOT]
[KEY:d]
[BIND:CIV_MISSION_FREE_CAPTIVES:REPEAT_NOT]
[KEY:f]
[BIND:CIV_MISSION_RELEASE_OTHERS:REPEAT_NOT]
[KEY:o]
[BIND:CIV_MISSION_TAKE_ARTIFACTS:REPEAT_NOT]
[KEY:A]
[BIND:CIV_MISSION_TAKE_ITEMS:REPEAT_NOT]
[KEY:i]
[BIND:CIV_MISSION_TAKE_LIVESTOCK:REPEAT_NOT]
[KEY:l]
[BIND:CIV_MISSION_RAID:REPEAT_NOT]
[KEY:r]
[BIND:CIV_MISSION_PILLAGE:REPEAT_NOT]
[KEY:g]
[BIND:CIV_MISSION_RAZE:REPEAT_NOT]
[KEY:x]
[BIND:CIV_MISSION_TRIBUTE_ONE_TIME:REPEAT_NOT]
[KEY:t]
[BIND:CIV_MISSION_TRIBUTE_ONGOING:REPEAT_NOT]
[KEY:T]
[BIND:CIV_MISSION_CONQUER:REPEAT_NOT]
[KEY:q]
[BIND:CIV_MISSION_DEMAND_SURRENDER:REPEAT_NOT]
[KEY:Q]
[BIND:CIV_NEWS:REPEAT_NOT]
[KEY:n]
[BIND:CIV_PEOPLE:REPEAT_NOT]
[KEY:p]
[BIND:CIV_ARTIFACTS:REPEAT_NOT]
[KEY:a]
[BIND:CIV_CIVS:REPEAT_NOT]
[KEY:c]