Hey Beon..  it seems like it was a permission problem.  set Files of "API" Directory to 755 and Problem is solved.  @ Steveland: as ...

Hey Stevland,  tested with OAuth2. Same problem. Only happens (here) when Users edits tickets in the frontend and tries to save them. Then you g...

Same here .. would be nice if someone could help

Same Problem with new Release 1.17.2 :-/ Workaround with FTP makes it possible to upgrade, but I think its not supposed to be like that. 

fixed with new release .. thanks

Cant even do a clean install with Awesome 1.17.1 After putting in the main data in setup.. i tried to click in install... immediatly giving me a 500 ...

Hi Steveland,  i tried uploading the original osticket1.17.2.zip from os ticket. extract it in plesk.  everything works fine then. Director...