You need to URL encode your parameter.
Using https://www.urlencoder.org/, this :
would give :
I realize this is a very old post but, for what it worth, we get the same with SpatialNet which uses Oracle GIS basic package. Ours is an old 22.214.171.124 DB on Linux. I did some research in My Oracle Support and I think this is the problem,
ORA-600 [kghssgfr2] After ORA-12571 (Doc ID 2026790.1)
The conclusion is that network problems cause the DB connection to ...