[Nino]

Is it possible, that there is a limit of showing 50 forums on the same level?

Also if I add more, they will be shown in the Dashboard but not at the page.

Is there a possibility to change this?

[Nino]

Hitting 50 forum limit? What can I do?

The problem is, there is no template-tags.php

[Nino]

https://bbpress.trac.wordpress.org/ticket/1997

[Robin W]

“The problem is, there is no template-tags.php”

It was renamed to just template.php

bbpress/includes/forums/template.php

However you should be able to use the following filter in your functions file, just amend the 100 to whatever you want

function bbp_increase-forum-per-page( $args = array() ) {
$args['posts_per_page'] = get_option( '_bbp_forums_per_page', 100 );
    return $args;
}
add_filter( 'bbp_before_has_forums_parse_args', 'bbp_increase-forum-per-page' );