Hi @Mysterious,
What are you using in the File Content field? Can you share that expression as well?
For the File Name field you don't have to use the formatdatetime function. You can also use only the utcNow, that accepts a format as well.
Below is an example
File Name
concat('Import Compliance Detail - #ITSM1308398 ', utcNow('yyyy-MM-dd'), '.xlsx')