What does “Blocked” really mean in the Firefox developer tools Network monitoring?

Question

The timing section of the Firefox Network Monitor documentation, \"Blocked\" is explained as:

Time spent in a queue waiting for a network connection.

Answer 1

I encountered this error whilst using an Angular 9 'dist' deployment. I discovered that the error appeared because I was trying to access an unreachable API, according to the specified IP address and port.

Therefore to solve it, I just have to reference a valid and accessible API.