Recovery volume size doesn't match
The problem is with the system reserved disk.
In the protected side is the original size (e.g. 50 MB)
And in the recovery side is another size (e.g. 4 MB)
There is a known Hyper-V issue that disks size of the protected VM MUST be in Whole value without decimal (e.g. 1 GB and not 0.11 GB). Once the customer resizes the disks to Whole value the issue resolved.