I'm also having a problem installing this plugin.
I'm using CB 2.3.0 and have installed 'ps_cbantispam_3.2.0+build.2018.07.04.15.36.44.65bb267a0' using the CB control panel interface
(Running Joomla 3.9.0 on PHP 5.6.38-0+deb8u1)
I have followed the instructions above and here
www.joomlapolis.com/forum/single-add-on-support/238527-solved-cb-antispam-not-showing-up-on-registration-page
- It does show up under Joomla > Extensions > Plugins
- It does not show up under Joomla > Community Builder > Plugin Management
- Likewise none of the fields appear in Joomla > Community Builder > Field Management
I'm guessing it's something simple and I've missed something...
Thanks, Jon.