The primary hub cannot be launched via the Infrastructure Manager. We can launch any secondary hub without issue. Redeploying the hub probe did not resolve the issue.
Release : 20.3.3
Component : UIM - IM
Download Infrastructure Manager build from the Home Page of the UIM 20.3.3 by going on to the link http://<ip of primary hub>/uimhome/installers.jsp.
Next, Uninstall IM and install IM again using the new downloaded IM build.
That should resolve the issue.