TFS Build Step - Encountered error TF400893: Unable to contact the server. Please check your network connection and try again

Question

When reviewing the build steps on an Azure DevOps build, when I click on a given build step to get the details, instead of seeing the build detail output, I get the error:

TF400893: Unable to contact the server. Please check your network connection and try again.

I've tried restarting my browser, I've tried using a different browser, and I've tried restarting the build agent on the build server, all to no avail.

How can I see the build step detail?

Answer 1

Ensure the URL is secure (https, not http)

I noticed that this happens when the URL that I use to access the build server uses the http protocol. When I switch to use https, I can see full build detail:

Over http:

Over https: