Cannot Import demos

Hi, I’d like to report that I cannot click any of demos.
I can see there is [Install Demos] in Theme Panel, but when I get there [install demo] section, somehow I cannot click any of demos. Only thing that I can get a reaction is [Live Preview] button. Besides, there is no reaction in this section, like
I already tested this OceanWP demo in test environment, it worked great. So I was gonna use pro demo by getting paid extensions – but I can’t.