Package installation error.1 user found helpful
Cannot use Concrete\Core\Foundation\Object as Object because 'Object' is a special class name
Alternatively, I think this issue has been addressed in recent builds of c5, but I'm not sure which version, or even whether it has been released yet.
Here is the pull request you are referring to.
"Dont use Object as class name #5820"
The current 8.3.2 version does not use Object.
I guess there's a chance that the package being installed may also need to be updated to avoid trying to use the old c5 Object class.