post request  http://ip/inkscopeCtrl/ceph/osd?depth=1   prompts "500 Internal Server Error"

When visiting the home page, the browser network bar prompts "500 Internal Server Error", the post url  is http://192.168.77.230:81/inkscopeCtrl/ceph/osd?depth=1.  Apache log show "mod_wsgi (pid=12877): Target WSGI script'/opt/inkscope/inkscopeCtrl/ inkscopeCtrl.wsgi'cannot be loaded as Python module., referer: http://192.168.77.230:81/inkscopeViz/index.html . The fixing  is instead the abs path of inkscopeCtrl.wsgi  with  Apache