Strange effects after changing URL

Good afternoon guys,

The last days i’ve been trying to solve some strange problems after i changed the URL from de given host-test-URL to the original, now used URL.

I am asolutely clueless whats wrong with the site.

So my problems short described are:

– Medialibrary doesn’t show the images in the grid view (always loading sign). but in list view it works. Uploads don’t work properly. i get the error: “When uploading an error has occurred. Try again later.” but the image shows up later in the list view. i didn’t change the rights on the folders, just changed the url.

– i use the plugin “WPbakery Visual Composer” which is helping with a WYSIWYG interface. When clicking on buttons and setting in-site-links, like on pages, the plugin is now unable to find these intern links. this worked before.

i might work around these problems, but i’m afraid, that i will get some strange errors in the future as well. i really think, that it’s just one or two files or settings, which i should change, but i have no idea which ones.

if you guys could help me i would be very glad. Thank you in advance!

best greetings
yannik
Site: https://www.uhcrangers.ch