This is a known issue, and is being worked on. If a city’s database has a street and the street has no nodes, you cannot complete the street and therefore you cannot complete the city. There’s a thread on this issue: Streets with 0 Nodes - #32 by ericjrw
As for the blue screen when you go to the street, what you are actually viewing is 0 degrees N (or S) and 0 degrees E (or W), which is in the Atlantic Ocean off the coast of Africa.