– Messed up backend.
– After moving the website, the sliders disappeared.
If your backend looks messed up, somehow like this:
Then it could be, that your cache folder isn’t writeable, so you should go to the WordPress’ Settings → Nextend Settings, press F12, refresh the page, write another cache folder in the place of the cache/, click on the Console tab, write this code in there, and press enter:
This will refresh the page, but the cache isn’t loading from the new place yet, so you should refresh it again, and if you can see your backend properly, then your problem is solved. If not, then check out the Messed up backend, Cache folder isn’t writeable and the Gzip Compression turned on part of the documentation.