Hi Suheyl, if your Bitbucket version remained the same and when you changed Visual Studio something stopped working, looks like the problem might be in the Visual Studio side.
I've seen they have an extension in their Marketplace, are you using it?
I've also found the article Using Bitbucket with Visual Studio 2017, can you follow the steps there and see if it works for you?
If you're still having issues, you might want to share some more information to see if someone in the Community can help you with that, like for example:
Hope that helps!
Hello! My name is Mark Askew and I am a Premier Support Engineer for products Bitbucket Server/Data Center, Fisheye & Crucible. Today, I want to bring the discussion that Jennifer, Matt, and ...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs