Failed to synchronize with OS...???

Having this problem on occasion, when using DD from within the OS selector boot menu...

When I perform certain operations, namely hiding/unhiding certain partitions, I get the above message...

What is this

 

Hello Batfink,

Thank you for using Acronis Partition and Disk Managing Software.

Please create Acronis Report and Windows System Information as it is described in Acronis Help Post.

Please submit a request for technical support. Attach all the collected files and information to your request along with the step-by-step description of the actions taken before the problem appears and the link to this thread.

We will investigate the problem and try to provide you with the solution.

Thank you.
--
Kirill Omelchenko