Can't Disconnect Hard Drive

I am getting an error when trying to open a windows session stating that no boot device is available.
I am trying to follow the instructions on this post: https://kb.parallels.com/123150
I can't seem to disconnect the current hard drive. I click disconnect on the drop down menu and it just goes back to the previous selection.
Any help is appreciated.

 

Hi JulioV. Please provide the macOS and the Parallels Desktop version.

 

I can't able to understand that, can you please explain this in brief.

 

Mac OS Mojave 10.14.6
Parallels Desktop 12

 

Parallels Desktop 12 doesn't fully compatible with macOS Mojave
It could be a root cause of the issue.
Is it possible for you to check the same issue with Parallels Desktop 15 trial version?

 

Hi, tried downloading parallels 15 and now when I try to run it I get an error stating Bootcamp partition used by Hard Disk 1 is missing. I think that when I upgraded to Mojave I did not keep the partition I originally had for Windows. How can I check this?

 

Hi, could you please collect the tech report once the issue reproduced and post the report's ID here.

 

Hi Maria, downloaded windows again with parallels 15 and now have a whole new issue. I will post a new thread as this is a completely different problem.

 

replied you at the new thread, looking forward to any results from you