Choosing a custom avatar URL causes the 2D UI to crash

[Exairnous]

Description
When you go to choose an avatar and click on "Avatar GLB URL" the Hubs 2D UI crashes.

To Reproduce
Steps to reproduce the behavior:

1. Go to the "More" menu and choose "Change Name & Avatar".
2. Click on "Change Avatar".
3. Click on "Avatar GLB URL" in the top right-hand corner.
4. Observe the Hubs 2D UI go white and an error is printed in the browser console (see below).

Expected behavior
You should be able to input a custom URL to use for your avatar without crashing the 2D UI.

Hardware

• Device: Laptop
• OS: Linux
• Browser: Chromium

Additional context
Error message:

react-dom.production.min.js:189 TypeError: t.split is not a function
    at m (index.esm.mjs:69:33)
    at Fe (index.esm.mjs:1915:21)
    at ou (react-dom.production.min.js:244:482)
    at ku (react-dom.production.min.js:263:46)
    at wu (react-dom.production.min.js:260:446)
    at bu (react-dom.production.min.js:259:431)
    at react-dom.production.min.js:283:96
    at _s (react-dom.production.min.js:281:398)
    at ss (react-dom.production.min.js:273:439)
    at Ba (react-dom.production.min.js:127:105)
dl @ react-dom.production.min.js:189
n.callback @ react-dom.production.min.js:189
Ao @ react-dom.production.min.js:144
ku @ react-dom.production.min.js:262
wu @ react-dom.production.min.js:260
bu @ react-dom.production.min.js:259
(anonymous) @ react-dom.production.min.js:283
_s @ react-dom.production.min.js:281
ss @ react-dom.production.min.js:273
Ba @ react-dom.production.min.js:127
(anonymous) @ react-dom.production.min.js:267
23:43:31.075 react-dom.production.min.js:127 Uncaught TypeError: t.split is not a function
    at m (index.esm.mjs:69:33)
    at Fe (index.esm.mjs:1915:21)
    at ou (react-dom.production.min.js:244:482)
    at ku (react-dom.production.min.js:263:46)
    at wu (react-dom.production.min.js:260:446)
    at bu (react-dom.production.min.js:259:431)
    at react-dom.production.min.js:283:96
    at _s (react-dom.production.min.js:281:398)
    at ss (react-dom.production.min.js:273:439)
    at Ba (react-dom.production.min.js:127:105)

[keianhzo]

Fixed by #6135