Revert "don't fail when sort parameter is missing"
Revert "don't fail when sort parameter is missing"

This reverts commit 47c00e61c79be91aa51d5614cb3845490d19a402.

schuel/hmmm,Openki/Openki,Openki/Openki,Openki/Openki,schuel/hmmm,schuel/hmmm