Same issue, a recent update from citrix caused hearthstone to crash. Removed citrix and hearthstone is back up and running, thanks for the advice.
Installed Citrix Workspace 1907 and now I’ve got problems. Not sure what version it was before but didn’t have any trouble at all.
Lets see if any of guides here help me through 
Didnt get anything, tried following steps:
- checked installations of .NET
- closed citrix / didnt load it on startup (W10 / disable on startup functionality)
- tried disable citrix indirect display adapter (not sure what happens if I remove it so thought disable would be enough)
Somewhat confused what to try next anymore
-D
Currently versions are 2.2 and 4.8. Likely that doesnt matter but this didnt help for me.
-D
I use Citrix Workspace 1907 and deleting the “Citrix Indirect Display Adapter” worked for me!
Hmm updated Nvidia drivers later and DirectX 12. Also stone updated but I guess its DX12 that solved issue. At least havent seen other updates