Comments aren't being saved to a file/folder

[JWLMSN]

The first time I executed the command "instatouch comments xxxxx" a filepath was printed at the terminal and the corresponding csv-file was properly saved (containing roughly 800 comments).
After that I tried the optional argument -f followed by a custom filename without a file extension and from then on no comments / no files were written anymore whatsoever. Only the message "InstaTouch Scraper Started" is flashing quickly at the terminal but the corresponding file is nowhere to be found.