Content / Design / Configuration page empty

[Gege]

Hello,

I have installed a theme I bought with Magento CE 2.1.5, but the page under Content / Design / Configuration is completely blank:

I reinstalled everything several times, I tried reindexing, flushing the caches, etc., with no success.

How to fix this?

Thanks

[Gege · Accepted solution]

Found the solution myself, on the server configuration page of my admin panel the option "allow_url_fopen" was off. I turned it on, reinstalled everything, and it worked!