There is a plugin “buddypress group moderation” or something like that adds the “eject user from group” function. I tested it on my site, but no real use for it.
Yeah, I saw that WP.org thread and Andrea_r gave answer there and Ipstenu as well
@wp_y2m5tr take time to read the link given you in that thread
You might want to try out (ala Facebook chat) BP-Chat on beta by @sbrajesh http://buddydev.com/plugins/bp-chat/
The best solution is to re-do the whole installation manually, as Andrea_r mentioned. If you’re getting into BuddyPress where you would have to add some configurations manually in htaccess/wp-config.php etc., then manual WP install and making it multisite would be good knowledge to have and good practice to boot.
https://codex.wordpress.org/Create_A_Network
“I recently used the plugin Enable Multi-Site to configure WordPress Multi-Site for my Buddypress install. “
Seriously – this is not recommended. I always recommend people set it up manually. the plugin only does 2 or 3 things for you – not the whole business and it doesn’t do any server checks that need a human eye.
‘If I try to navigate back to the main URL, I get nothing but a blank screen. Strange….”
No, not strange – it’s a common error called a white screen of death. 
It means you have some php messed up somewhere.
Can you get in to admin? Go in there, disable plugins. 90% chance something in there does not work with multisite.
You can also use the BuddyPress Auto Group Join Plugin
@andrea_r hit the nail as usual
Following her suggestion, had a look at the raw html in order to find where it was going berserk.
It was a piece of custom code by @etivite which showed forum topic freshness as a permalink and which needed his forum extras wrapper plugin activated (which was not)
SOLVED thanx to @andrea_r and @djpaul
Well, it seemed to work for a while. Problem I am having is after browsing the user created sub site, the main site crashes on me. If I try to navigate back to the main URL, I get nothing but a blank screen. Strange….
Thank you! I think that did the trick for me. I will do some more testing to be sure.
well eevryone is i just posted as well…and im using all the latest updates both wordpress and BP
>> If you want to use a WP network install, you need to install WP in the root and not a subdirectory:
oops….
I will try ^^
Any news on this problem ? I’m having the same with WP 3.0.3 and BP 1.2.6 
The author site is down, sorry to post here.
@Tekuan What techguy said.
Which BP Chat plugin caused that problem?
@bcade someone posted the same thing about “Enable Multisite Plugin” in WordPress.org forums, see if solution provided there will work for you.
https://wordpress.org/support/topic/plugin-enable-multi-site-enable-mult-site-only-partially-worked?replies=3
I think the key that you’re missing is that if you create something that is a derivative work of BP/WP and then distribute it then it needs to be GPL. If you use BP with a proprietary closed set of software that you’re not distributing to others you should be fine.
Disclaimer: I’m not a lawyer.
“Permission denied”
This is what you need to fix.
No, becasue that’s how core multisite works.
The GPL only applies to *distribution*. If your client plans on packaging up the website somehow… then worry about it.
“Does that mean that all of the code for this project would have to be GPL licensed and made available for free because we use BuddyPress for social networking? “
no, it does not. only if you actually *release * it. Just having it as part of your website is not releasing your code.
think of it this way – Buddypress is a plugin for WordPress. Anyone who build a site on WordPress itself is also not required to release their code.
(and I will note that GPL doesn’t mean it has to be free either. There’s plenty of for-sale GPL plugins and themes.)
If you want to use a WP network install, you need to install WP in the root and not a subdirectory:
https://codex.wordpress.org/Giving_WordPress_Its_Own_Directory
Read the red notice.
@lilyo Thanks for your help 
Thx @djpaul for looking into this
Trust me, all I did was add a forum topic !
Thought it was a theme related issue, but as you can see, even under default the problem still occurs.
And I disabled EVERY bp plugin
