When I issue a move command, an error suddenly appears.

i received the error below doing the same:

The mod Robot Army (2.4.20) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event robotarmy::on_tick (ID 0)
LuaCommandable API call when LuaCommandable was invalid.
stack traceback:
[C]: in function 'index'
__robotarmy/robolib/Squad.lua:248: in function 'isAttacking'
robotarmy/robolib/SquadControl.lua:32: in function 'executeBattleAI'
robotarmy/robolib/SquadControl.lua:18: in function 'updateSquad'
robotarmy/robolib/eventhandlers.lua:89: in function 'processSquadUpdatesForTick'
robotarmy/robolib/eventhandlers.lua:446: in function 'tickForces'
robotarmy/robolib/eventhandlers.lua:559: in function <robotarmy/robolib/eventhandlers.lua:556>

How report?

I figured out if you use the ERM enemy mods the movement breaks this one, so not sure if you are also using those. It might specifically be the player Terran one... or unrelated!

That mode is not in use.

This is part of the new API, there's a "commandable" layer added which was not there before, and now I need to check that the commandable is valid in addition to all the other shit.. ugh. Thanks, I will try to patch this on the next version to be more stable.