Media Library Grid View Not Loading

I’m having an issue with my multisite install where the Media Library works fine on my primary site, but grid view does not load on my secondary site in my multisite install.

I’ve searched around for an answer, and I found many similar threads, but none of the solutions helped me.

– I have tried reinstalling WordPress.
– I have disabled all of the plugins, but none of them seems to be the source.
– I have used the default theme, but still the Media Library grid won’t load.

Is there any reason why this would work on one of my multisites but not the other?

Alternatively, is there a workaround to use list mode when writing posts? As it is, it makes writing posts very difficult as no media can be inserted into any posts.