Nawet twój przykład jakoś nie działa
[20:18:13] [Server thread/ERROR]: indentation error: expected 0 tabs, but found 1 tab (esa.sk, line 4: trigger:")
[20:18:13] [Server thread/ERROR]: indentation error: expected 0 tabs, but found 2 tabs (esa.sk, line 5: open chest with 1 rows named "blabla" to player")
[20:18:13] [Server thread/ERROR]: indentation error: expected 0 tabs, but found 2 tabs (esa.sk, line 6: set {openGui::%player%} to true")
[20:18:13] [Server thread/ERROR]: indentation error: expected 0 tabs, but found 2 tabs (esa.sk, line 7: format slot 0 of player with 1 of diamond named "blabla" with lore "twojelinijki||itemLocked" to be unstealable")
[20:18:13] [Server thread/ERROR]: indentation error: expected 0 tabs, but found 2 tabs (esa.sk, line 8: stop")
[20:18:13] [Server thread/ERROR]: can"t understand this event: "variable" (esa.sk, line 1: variable:")
[20:18:13] [Server thread/ERROR]: invalid line - all code has to be put into triggers (esa.sk, line 3: command /gui []")