Symptoms:
Unable to generate support bundle through VAMI or vSphere Client on vCSA 6.7 U3l (build 17137327). It takes 20 minutes to collect the support bundle with CLI.
.
VMware vCenter Server Appliance 6.7.x
This has been resolved in vCenter 6.7U3m:
VMware vCenter Server 6.7 Update 3m Release Notes
https://techdocs.broadcom.com/content/dam/broadcom/techdocs/us/en/pdf/vmware/vsphere/vsphere/vSphere-6-7-Release-Notes/vsphere-vcenter-server-67u3m-release-notes.pdf
Workaround: