Error for xsd to json #22

I get this error:

stack": [
"Error: spawn swipl ENOENT",
" at exports._errnoException (util.js:746:11)",
" at Process.ChildProcess._handle.onexit (child_process.js:1053:32)",
" at child_process.js:1144:20",
" at process._tickDomainCallback (node.js:381:11)",
" at process. (/home/syedn/proj/ori/propfi/node_modules/loopback/node_modules/continuation-local-storage/node_modules/async-listener/index.js:18:15)"
],
"level": "error",
"message": "uncaughtException: spawn swipl ENOENT"