skrabak

Correct answer for people with the issue: wait, the plugin setup is slow and needs time to resolve partial operations.Aprox. 15 minutes.

Hey,
I have checked and yes the plugin doesnt seem to work correctly even on my website(seems the plugin had recent update 11.8 and didnt get fixed yet). Would suggest something like W3 Total Cache. Also it would help with other issues of the website. I have run the site through gt metrics and here you can see the result.

https://gtmetrix.com/reports/www.pokeplanetsz.nl/RrytPOX5/.

Hello,
you need to navigate to wordpress dashboard(after you login to wp admin) appearance -> customize, once it loads select Site identity ->Site Title and logo settings-> There is the option to change site name or slogan. What plugin are you using?