Symptoms:
From the VMware Site Recovery UI, you see the following error message:
<VLSR-URL>: Cannot retrieve incoming replication issues: Failed to serialize response
VMware vSphere Replication 9.0.x +
VMware Live Recovery 9.0.x +
This error is typically seen if there are stale VM replication entries in the vSphere Replication vpostgres database.
These stale VM replications entries are created by force stopping a VM replication.
Open up a support request with Broadcom's VMware Live Site Recovery team for further assistance as the resolution involves making database changes.