debug50 error in online IDE: 'MODULE_NOT_FOUND'

Question

While working on pset3 tideman problem, I attempted to use the debugger and got this error in return. the debugger opens and then closes immediately, and generates the below text. How can i resolve this to start using the debugger again?

~/week3/pset3/tideman/ $ debug50 tideman.copy Alice Bob Charlie
internal/modules/cjs/loader.js:818
  throw err;
  ^

Error: Cannot find module '/home/ubuntu/.c9/bin/c9gdbshim.js'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
    at Function.Module._load (internal/modules/cjs/loader.js:667:27)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12)
    at internal/main/run_main_module.js:17:47 {
  code: 'MODULE_NOT_FOUND',
  requireStack: []
}

Answer 1

closing and re-opening the tab solved the issue.