Sudden Issues w/ Vanilla 2.3

Suddenly I’m having issues with the default embed link not loading. All the other links seem to work fine.

i.e. Forum is installed at https://www.url.org/forum/ and embed is https://www.url.org/discussion/

If I go to https://www.url.org/discussion/ it returns a blank page. However, if I go to https://www.url.org/discussion/#/categories/ it loads fine.

Suggestions?

My forum is at: https://www.nerdlouisville.org/forum/ and embedded at https://www.nerdlouisville.org/discussion/