Error 500 appended to downloaded documents

[mote0230]

Using the more up to date wakeasp_inc fork of this, I was suddenly getting an error 500 "the controller must return a response null given" appended to my files i got with $TBS->Show(OPENTBS_DOWNLOAD, $filename);
I was able to fix this by adding this empty response type from this answer:
https://stackoverflow.com/a/73239817/1832105
and sending it after the tbs->show

Hope this helps anybody.