DX error 0x8876086c is caused by DirectX, not Skype, though it maysometimesappear in Skype.Any error codes with DX are for DirectX.
Here are a couple of fixes you can try:
Fix 1
Fix 2
Search the internet for a DirectX update then install the update. These should normally be on the Microsoft website,
Chat with our AI personalities
update windows or try updating your graphics card either from windows or from the name of the graphics card main site, check if they have any updates for your card