Hi,
I created the following flow which check if files are created or changed in a certain folder and if they are pptx files it converts them to pdf.

The flow worked well until I made the following changes:
I added a check for docx files so that they also get converted (I undid this change)
I duplicated subfolders in the target folder of the OneDrive trigger so that the pdf conversion is applied to existing files. This worked for some time until the error occurred.

What is confusing is that there is no error for a specific execution. Ignore the one failed test (the file didn't exist).
So it seems that the flow never really comes to execution but its more of an initialization problem I am assuming.