The company was preparing for a mission interruption test that would release all eight SuperDraco Dragon Crew engines in mid-launch, indicating that the capsule can escape from the host rocket in an emergency. This test was scheduled to take place in June, but I'm not sure that it will happen on schedule in light of the incident. The start of the crew had to take place already in July, but, apparently, the time will change.
NASA does not scare away from an accident. Administrator Jim Bridenstine stated in a statement that anomalies like this are "why we test" and that the space agency "learns, will make the necessary adjustments" and progress with the program "Commercial Crew". However, this is clearly not what NASA wanted to hear a few months before it began to make history – it's another reminder that the road to a private human space flight was dangerous.