VCF 5.2.0.0
The license check is unable to finish because of the expired licenses.
Update the certificates on the vCenters with expired certificates and the License check should be able to succeed.
This issue can also occur due to expired passwords documented in KB- License check: Failed to fetch assigned license banner in SDDC Manager
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For more information please see the following documentation and knowledge base articles.
SDDC Documentation:
Managing Certificates in VMware Cloud Foundation
Replace an Expired vCenter Server Certificate
Knowledge Articles:
VMware vCenter in Enhanced Linked Mode pre-changes snapshot (online or offline) best practice
vCert - Scripted vCenter Expired Certificate Replacement