webserver: fixed bug where invalid category search string wasn't caught causing webserver to hang or crash
webserver: fixed bug where invalid category search string wasn't caught causing webserver to hang or crash

paperscape/paperscape-mapgen,paperscape/paperscape-backend,paperscape/paperscape-backend,paperscape/paperscape-mapgen,paperscape/paperscape-mapgen,paperscape/paperscape-backend,paperscape/paperscape-backend,paperscape/paperscape-mapgen