Error while running event MegaBotStart::on_cutscene_cancelled (ID 187)
Unknown equipment name: kr-energy-shield-mk4-equipment
stack traceback:
[C]: in function 'put'
MegaBotStart/control.lua:144: in function 'EquipArmor'
MegaBotStart/control.lua:172: in function <MegaBotStart/control.lua:170>
stack traceback:
[C]: in function 'exit_cutscene'
base/script/freeplay/freeplay.lua:122: in function 'handler'
core/lualib/event_handler.lua:72: in function <core/lualib/event_handler.lua:70>

What version of Krastorio 2 are you using? I'm testing using version 2.0.16.

I'm getting this same error, and I'm using 2.0.16 as well.
Do either of you use Space Exploration as well? It changes the internal names back to "energy-shield-mk*-equipment" which may be causing the issue.

This is somewhat confirmed by checking the mod list for the "energy shield mark 3" and above is listed as Space Exploration > (...)

Sadly, I'm somewhat inept at LUA coding so I'm unsure how to 'test' this, but I'm fairly sure that it's Space Exploration that is causing the issue, assuming the original poster uses it.