Hello, @Kostas Brv.,
We always recommended to only using the plugins that came with the theme package OR those are compatible with our theme, here is the list: https://postimg.cc/F7Zxcb8L
Other than these plugins you can try with any third-party plugin which better meets your requirements but at your own risk as we do not give a guaranty for full theme compatibility with all existing 3rd party plugins, and additional customization is outside the scope of our basic support.
Thanks for your understanding.
Regards 8Themes Team.