"Error in XML Document (2,2)" error when updating WCF service reference

I'm trying to merge my branch into master using git. There is a WCF service and a application using that WCF service as service reference.

I can build and publish WCF service without any problem but when i try to update my service reference i get

"There is an error in XML document (2,2)"

error.

I don't know witch xml document i should check.

I have checked Reference.svcmap file of service reference and it looks fine. I even pasted a working version of that file from git.

Where i should look for this error?