File trigger, unattended

Hi, I have a problem with trigger.

Last week I created a bot with file trigger, moved it to prod CR and created Event trigger.
 

For few days, the bot worked almost as it should. It really ran after the file appeared, there just were in history some weird task with failed status on the same VM.

I did not care about the error much, because the bot ran as it should. But this week the trigger stopped working. It is weird, because noone changed anything. I still use same folder, same bot, same trigger. Now, if there is new file in the folder, trigger is not activated and the bot does not start.

Does anyone please know, why the trigger stopped working?