Navigating from Main page to Template causes error

[JoshuaSkootsky]

Error is caused by appendChild on null node.

[JoshuaSkootsky]

You click on Blog, and are redirected to https://instastack.herokuapp.com/blogtemplate, get a white screen, and in console this error comes up:

bundle.js:42384 TypeError: Cannot read property 'appendChild' of null
    at bundle.js:64962
    at Array.map (<anonymous>)
    at t.value (bundle.js:64950)
    at GA (bundle.js:42402)
    at JA (bundle.js:42406)
    at bundle.js:42436
    at Object.t.unstable_runWithPriority (bundle.js:42492)
    at Qa (bundle.js:42436)
    at ma (bundle.js:42435)
    at ba (bundle.js:42434)
gA @ bundle.js:42384
bundle.js:42434 Uncaught TypeError: Cannot read property 'appendChild' of null
    at bundle.js:64962
    at Array.map (<anonymous>)
    at t.value (bundle.js:64950)
    at GA (bundle.js:42402)
    at JA (bundle.js:42406)
    at bundle.js:42436
    at Object.t.unstable_runWithPriority (bundle.js:42492)
    at Qa (bundle.js:42436)
    at ma (bundle.js:42435)
    at ba (bundle.js:42434)

[JoshuaSkootsky]

I think this is related to:

let container = grid.querySelector(`#\\3${i}`);
    container.appendChild(node);
5:59

line 114 in BlogTemplatePreview.js Component

[JoshuaSkootsky]

https://instastack.herokuapp.com/template still broken