Cant edit pull request

#!js

Uncaught TypeError: Cannot read property 'split' of null
    at t.default (parse-compare-spec.js?b510:4)
    at e (edit.js:255)
    at e.Router.<anonymous> (edit.js:281)
    at e.Router.<anonymous> (index.js:7363)
    at o (director.js?a3c1:517)
    at n (director.js?a3c1:298)
    at e.Router.d.invoke (director.js?a3c1:522)
    at r (director.js?a3c1:480)
    at e.Router.d.dispatch (director.js?a3c1:492)
    at e.Router.handler (director.js?a3c1:186)
    at e.Router.d.init (director.js?a3c1:214)
    at Object.2436 (pullrequests.js:44)
    at t (bootstrap df72b6fe10a182fb7f68?195d:52)
    at Object.2942 (pullrequests.js:12586)
    at t (bootstrap df72b6fe10a182fb7f68?195d:52)
    at window.webpackJsonp (bootstrap df72b6fe10a182fb7f68?195d:23)
    at pullrequests.js:1