Create Team not working. Demo content bugged.

Hello I’ve reinstalled wordpress more than few times. I installed one with theme with Demo content and one without Demo content. I followed instructions of the theme including clearing browser cache (as suggested in other similar topic) etc. but nothing seems to work for me. there is no possibility to create team on neither of my wordpress sites now. On one with clear installation, without Demo after clicking on “create team” site is loading forever. Anyway new sites are created but without any member who created it.
https://gyazo.com/9db4aa2de851c546d1e6d3028e28e0ca
On my othere installation, with Demo content nothing happens after clicking on “create team” button even, when i checked to allow creating grups in bb press preffernces, etc. Anyway site is bugged with Demo content, and it doesnt seems to look like here – http://skywarriorthemes.com/arcane/landing/
https://gyazo.com/2faa90bcc84ef291ed6618d71c571cc0
I seems as theme is incomplete or something. Pls help!