The recovery host resource pool does not have enough resources to recover all the virtual machines in the VPG.

Edit the VPG and change the recovery host for one or more of the VPGs so that there are available resources.

If write-order fidelity is not required by all the virtual machines in the VPG, remove the virtual machines that don’t require write-order fidelity from the VPG and create a new VPG for these virtual machines.

Increase the resource pool resources.