I was playing around with a Lab design a bit, and found a problem.
The sequence I was using was:
GGUUAUCUCAAGCGGGAUCAGUGAUAUAAUCAACAUCAGCACCAGGAUGGAGUUAGGCUAACGGCCAGGCCGAGAGAGAAAGAAACAACAACAACAAC
This sequence was stable.
Whenever I changed it to something unstable (in this case 23/31), it wouldn’t update the ‘map’, it would just give me the red error outline.