Hello Nicolas, see below.
The message implies insufficient funds, but this is not the case. Also please keep in mind : it happens at the exit, not at the enter.
By now, Local Support already told me that they received the same error, though with manual trading (in PRT-IB Demo !). I assume it is already taken care of by the engineers.
N.b.: The “Partial” is not even correct because nothing is exited, thus also not a part of the position.