VSSadmin list writers will show the failed component - maybe it is from a previous backup software as dbeato suggested

Could try Acronis VSS Doctor on the host - link

Try unchecking Backup Integration Services in the Management --> Integration Services area to get a crash-consistent backup at minimum and see if it works.

This link says the issue will be fixed in Server 2016, 2012 R2 applies to this message, but is not mentioned for fix...

Re-Install up-to-date Guest Integration services on the Guest VM

@jasgot
Run this on EMS:
netsh http show sslcert

0.0.0.0:443
0.0.0.0:444
127.0.0.1:443

should have the same Certificate Hash / Thumbprint
(take a screenshot)

Whichever one doesn't match - delete

netsh http delete sslcert ipport=0.0.0.0:444 (for example)

Then reload that with the right cert

netsh http add sslcert ipport=0.0.0.0:444 appid='{app id}' certhash=<correct thumbprint>
(or whichever ip/port didn't match earlier)

Then run netsh http show sslcert again to confirm the change!