I have a toolchain doing server side rendering for a JS application. Client side rendering is working, but when doing serverside rendering I'm getting this error:

TypeError: Cannot read property 'variables' of undefined
    at Object.81607 (main:145914:80)
    at __webpack_require__ (main:216155:42)
    at Object.14002 (main:127698:18)
    at __webpack_require__ (main:216155:42)
    at Object.52537 (main:127802:17)
    at __webpack_require__ (main:216155:42)
    at Object.36219 (main:127690:45)
    at __webpack_require__ (main:216155:42)
    at Module.8336 (main:151773:13)
    at __webpack_require__ (main:216155:42)

How do I go about finding where this error is coming from?

Does (main:145914:80) mean column 145914, line 80 of main.js?

• I don't have a main.js file. I assume this is the name of the file that webpack/babel generated. I do have main.b4b6555b.js so I've been looking at that. Is this correct?

I've worked out how to turn off minification, so in main.b4b6555b.js I have non-minimised code which is useful. But line 80 is a comment - so I assume I have something wrong.