Well i tried to check the updates but getting this issue while authenticating :
http://prntscr.com/mjxd2k
You can try the alternative method as well to update theme :
https://wplms.io/support/knowledge-base/manually-updating-wplms/
2 . to see the change in the header layout please just change the header layout from customize and then publish the changes .
Now open the site in incognito mode and check if changes happen or not .
3 . there is no design layout setting available for breadcrumbs .
4 . elementor wplms blocks issue : Well it seems that our theme is not able to detect the elementor .Please try the following :
deactivate elementor , delete it .
then re-install and re-activate it again and then check if they appears or not.