Here is a correct version response for WebSpellChecker Server 5.5.x.x on a Linux server:
{ "Copyright": "(c) 2000-2020 WebSpellChecker LLC", "ProductWebsite": "webspellchecker.com", "ProgramVersion": "5.5.x.x x64 master:xxxxxxxx (xxxx) #xx", "PackageVersion": "5.5.x.x master:xxxxxxx (xxx) #xx" }