As I cannot see any reference on how to use properly the sysparm_query_category, may I confirm on how did you append the sysparm_query_category in get request?
axe
database-metadata
permanent
payflowlink
parentdatawidget
proximity
jfrog-container-registry
gaussian
device-emulation
hotlinking
selenium4
eml
flexslider
out-parameters
cyberduck
gemfile
flash-cs5
lerp
google-language-api
redhat-openjdk
https
motorcortex
objective-c-category
google-gears
fileserver
dateonly
wicket-8
snazzymaps
unicorn
sinon
