Cannot print with print.gcode_file or print.project_file

Hello,

I set up a python code with a web ui for managing my Bambu P1S. Here I can see the status and manage files through ftp. The status of the printer is received succesfully, and I can also send gcode lines which the printer succesfully does. But for some reason I cannot print with either print.gcode_file or print.project_file command. Printer is in local mode.

Am I missing something or is this function broken?

Thanks in advance