Got response: Cannot read properties of undefined (reading 'split')

I'm running the server using npm run start and the program appears to build and run fine however when I try running the httpTest.lua script I get the error

Got response: Cannot read properties of undefined (reading 'split')

It appears to be coming from the following stack trace.

localhost:3000/precompute/00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000010000001101110000110/L/J/18/0/0/0/0/0/0/X..../false
TypeError: Cannot read properties of undefined (reading 'split')
    at parseUrlArguments (/home/user/projects/StackRabbit/built/src/server/request_parser.js:62:27)
    at RequestHandler.routeRequest (/home/user/projects/StackRabbit/built/src/server/request_handler.js:109:52)
    at /home/user/projects/StackRabbit/built/src/server/app.js:48:40
    at Layer.handle [as handle_request] (/home/user/projects/StackRabbit/node_modules/express/lib/router/layer.js:95:5)
    at next (/home/user/projects/StackRabbit/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/home/user/projects/StackRabbit/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/home/user/projects/StackRabbit/node_modules/express/lib/router/layer.js:95:5)
    at /home/user/projects/StackRabbit/node_modules/express/lib/router/index.js:281:22
    at param (/home/user/projects/StackRabbit/node_modules/express/lib/router/index.js:354:14)
    at param (/home/user/projects/StackRabbit/node_modules/express/lib/router/index.js:365:14)
Full request: 1.81ms

I'm not sure what might be causing this

The failure is reported in built/src/server/request_parser.js at line 62, reached through RequestHandler.routeRequest in built/src/server/request_handler.js. Run npm run start and httpTest.lua to reproduce, then inspect the request-parsing inputs used by the split call. Done means the script request is handled without the TypeError.