Convert richtext to markdown yet keep pandoc zotero placeholders intact

maybe I should give up, I feel guilty because always asking you for help!
Unfortunately there is a problem:
the compiler-log reads:

[WARNING] Could not deduce format from file extension
Defaulting to html
pandoc: als: withBinaryFile: does not exist (No such file or directory)

I have no idea, what this points to, but I can say that the test-edit.md file has not changed \_ into _.
The docx file has not been compiled at all.

if I could give you any more information or screenshot some settings, please just let me know, I will try!

Once again, however, I am wondering if the possibility to use styles in footnote might be something the developers could think about? Or any easy way to define any letter or sign as compiled as raw text. Somerthing that would not be that crazy as this issue reveals? But I am very new to scrivener. Maybe I am holding it wrong.