Message appears in Step 13 of Recovery plan:
Failed to promote replica devices. Timed out (300 seconds) while waiting for SRA to complete failover command
VMware Live Site Recovery 9.0.2
The warning points to a communication issue with SRA, updating tasks on the storage side.
It would be recommended to look into the following:
Check the VLSR advanced settings parameter Site Pair >storage> storage.commandTimeout. Increase to 600,900 accordingly.
Rescan the SRA storage devices.
Check the Network Time Protocol settings across the appliances to ensure that they are matching.
Re-deploy the SRA in VLSR VAMI.