There are two possibilities:
There was a trading halt in GOOG shares at that time
Data providers have screwed up
Since there is no GOOG trading halt listed on the Nasdaq Trading Halt page, one can only assume that this is a data provider issue. One could also reach the same conclusion by looking at Time & Sales.
Settlement refers to the transfer of funds and the title of a security between the buyer and the seller. Equities (stocks, bonds and ETFs) have T+2 settlement whereas options and government securities are T + 1. There are some exceptions.
You are only allowed to trade settled cash in a cash account. That means that with T+2, the funds from a sale will ...