[qlqlo]

After I Install and activate bbPress nothing shows up in my admin area sidebar (Forum, Topics, Replies do not appear). When I create a new page and paste there a shortcode for displaying the whole forum index, the page shows an error. I don’t know what went wrong, I tested on my localhost and it worked fine.
I also tried to delete the plugin and install it again.

[Robin W]

it could be a theme or plugin issue

Themes

As a test switch to a default theme such as twentytwenty, and see if this fixes.

Plugins

If that doesn’t work, also deactivate all plugins apart from bbpress and see if this fixes. if it does, re-enable one at a time to see which is causing the error.

If you cannot do this to your site (say because it is live) then use the ‘troubleshooting’ features of this plugin to let you test without affecting other users

Health Check & Troubleshooting

Then come back