note that Extended data manager may not work, most likely will not work . The developer of that add-on was DeBaat and he stopped updating them over 2 years ago so I would suggest deactivating that one
I am having the developer look at your issue as I noted there were some errors on your site noting SLP EXP and Premier.
In the mean time if you could check these
- make sure the web server cache is cleared (opCache, minification apps, CDNs, etc
- as well as the browser