I used the multisite language switcher plugin last year for this website http://www.serene-yachting.com/ and it worked fine. Currently I am revamping another website (http://18.104.22.168/~villaghi/) using the same network structure, same theme and of course the multisite language switcher plugin. The only thing I have changed is the hosting provider, meaning that the first website is hosted by dreamhost and the one I am revamping now is hosted by bluehost.
I have set the network right, but when I am trying to link the pages, it is not working. It works only for home page. When I am in a page's editor and selecting its linking page at the drop down menu of the plugin and hit 'update' it doesn't save the selection.
I had the Yoast SEO plugin deactivated and tried again but nothing changed.
What is wrong?