You were right. The execution Lock was the issue.
EDIT:Next problem:
I use the "Hermes script" for the messages.
The first time the window appears above the hero. That's how it should be.
But after the first message command, when I use the same message again,
it doesn't work one more time just like before. The game shuts down and this confusing error emerges.
"\p" - "...the containing message will be opened as a speech-bubble-esque pop-up over a defined character"
[ 0 ] means it will appear above the hero.
This issue exists
only with the ABS in the script database. That's why I post it here.