Having trouble installing CB Gallery

I'm having trouble with the installation.

Here's my site: afrisnet.org

I installed mod_cbgallery_2.3.0+2018.05.10.zip
Is there a way I make it show up in Tabs?

I tried making a tab, naming it Gallery, and putting {loadmodule mod_cbgallery,CB Gallery} in the text area.
The error message "CB Gallery not installed" appears at the bottom of the page.

Then I installed ps_cbgallery_2.3.0+2018.05.10.zip
Enabled it.

I still get error message "CB Gallery not installed" appears at the bottom of the page.

Thanks in advance for your help.

Download and install CB Gallery from its product page below if you're confused about what package to download on our downloads page.

www.joomlapolis.com/addons/cb-gallery

That will install CB Gallery, CB Gallery Bot, and CB Gallery Module. Next within CB > Plugin Management you need to publish CB Gallery. That's all you have to do. You should see your Gallery tab on your profile and can begin using it immediately. If you want it displayed as module you can use CB Gallery Module. If you want to embed it in an article you can use CB Gallery Bot.