Got this while failing the mission.
Later in the game I saw "Progress to Miner: 220%" in the mining colony status window.

2021-03-13 17:41:33 OnCompleted [Commonwealth Mining 05: Rescue Trapped Miners]: Exception in [email protected]; arg = (1049179 blacklisted True) [(1049179 blacklisted True)] ### ([email protected] gType "blacklisted" True) ###

Had a quick look, maybe line 205:
[email protected]
->
[email protected]

george moromisato 11 days ago:

Fixed in 1.9 Beta 4. Thank you!