Chrome Developer Tools hung at "Loading profile..." prompt while recording runtime performance

Question

I am using Chrome Developer Tools under Windows 7 to record runtime performance (Chrome 67.0.3396.62 (64-bit)). I am able to click DevTools' Record button to start capturing performance metrics, but when I click its Stop button, the following Loading profile... prompt appears and never changes:

I tried exiting and reloading Chrome, but this problem persists across restarts. How do I resolve this problem?

Answer 1

It turns out that just exiting and reloading Chrome may not stop all of Chrome's background processes. For example, here is a screenshot of Windows Process Explorer showing multiple instances of chrome.exe still present after I exited Chrome:

Once I manually killed each of these processes (by clicking on the process and then pressing my Delete key), Chrome Developer Tools' record runtime performance capability was restored.