D Cartwright

Basic live chat within groups.
Once installed, activate Live Chat in the group admin area (or during group creation).
The Live Chat area provides an ajax chat room which displays the most recent messages along with timestamps and usernames. It also has a “who’s online” area which shows other group members viewing the Live Chat page. “Super Admins” can spy on the chats of all groups.
This plugin is extremely basic and has no promises of support.
<h3>Notes</h3>
History.txt – contains all the changes since version 1.0 
License.txt – contains the licensing details for this component

BuddyPress Group Livechat

itthinx

This plugin redirects 404’s caused by hits on pages that are protected by <a href="https://wordpress.org/plugins/groups/" rel="ugc">Groups</a>.
The redirection settings can be adjusted in Settings > Groups 404 :
Visits to protected pages can be redirected to:
<ul>
<li>a specific post, or</li>
<li>the WordPress login</li>
</ul>
The redirection can also be applied for restricted categories, tags and other taxonomy terms if <a href="https://www.itthinx.com/shop/groups-restrict-categories/" rel="nofollow ugc">Groups Restrict Categories</a> is used.
The redirect status code can be selected among:
<ul>
<li>Moved Permanently (301)</li>
<li>Found (302)</li>
<li>See other (303)</li>
<li>Temporary Redirect (307)</li>
</ul>

Groups 404 Redirect

I know this plugin hasn't been updated in a couple years, but IMHO Groups and its related plugins (like this one) are a hidden gem for WordPress sites. So many people jump to complicated membership plugins when they could do everything they need with Groups. This 404 redirect add-on works like a charm. I'm using it on the latest version of WP 5.x

Perfect.

Redirect 404's when a visitor tries to access a page protected by Groups.

BuddyPress Group Livechat vs Groups 404 Redirect