Syntax Error on GJ install

I'm getting a syntax error when I install the GJ package
It installs GJ, Forums, the GJ module, and GJ Search, but no other GJ plugin components will install.

Any ideas?

System Information
Joomla: 4.1.2
Community Builder: 2.7.2
PHP: 7.4.29
Database: mysql 5.7.37

Package
File: 046_cbgroupjiveabout_3.5.0+2021.05.12.zip
Log:

That can happen when an error is thrown during install that wasn't captured. It results in the JSON response our installer frontend UI expects being invalid JSON. Was the plugin install installed fine regardless? Does it still error if installing a second time?

Te GJ plugin GJ Search, and GJ Forum were installed... all others failed in the GJ suite.
I've tried now about 10 times, always the same result, so error is persisting.

Also, weirdly - GJ Activity appears in the GJ Activity tab stream, but it won't appear on the main Activity stream menu, unless there is a connection between users. So, 2 users part of the same group, but the activity will only show if they are connected?
Any ideas about that?

Download a GJ integration manually from our downloads page below. Once done unzip the package. Now try installing the integration from /extensions/cb_plugins manually within CB > Plugin Management > Install New Plugin. Let me know if that fails and if it outputs any errors. Very strange GJ About would even possibly error as it doesn't do anything during install unless it's migrating an older version of GJ About.

www.joomlapolis.com/downloads

Also, weirdly - GJ Activity appears in the GJ Activity tab stream, but it won't appear on the main Activity stream menu, unless there is a connection between users. So, 2 users part of the same group, but the activity will only show if they are connected?
Any ideas about that?

One issue at a time please. Lets get your install issue sorted out first.

OK, thanks, I'll give it a try and let you know... It's a fresh install into a new J4 environment. So no old versions running.
The only other major component is Gantry 5 and the Helium template

That worked!