SELinux is not supported by the CSP agent, so the install will always stop if you keep SELinux enabled.
Enabling SELinux back is not recommended since it can and will interfer with the CSP agent.
Why disabling SELinux is important? Because both SELinux and CSP are doing the same thing, except CSP does it better! It is like having two AV softs on the same machine, not recommended.
Let me know if you have questions! And if this post has answered them, please mark it as solution ;)
Best regards,
Shulk.