I can not see the picture you post.The orignal C drive can successful set velossd cache and successful boot and login desktop.The C drive already act a active partition.
please look at Disk manager if your boot volume is marked “active Partition”. This may be the reason for this error message, because the VeloSSD Boot Sector did not get executed. Therefore the software neutralizes the cache to prevent malfunctioning.
You can make the boot volume an active partition by right clicking it and selecting “Mark active”