Today, SpaceX experienced a series of bad luck. Weather stopped a historic crewed mission from launching, and another Falcon 9 rocket crashed upon landing, halting the third planned flight, too.
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SpaceX explained the issue that led to a failed flight of the Falcon 9 rocket, obtained early permission from the FAA, and launched another batch of Starlink satellites while it works on fixes.

SpaceX ends streak of 334 flawless flights as Falcon 9 fails. Starlink survivors to die soon [Update]
The super-reliable Falcon 9 rocket experienced a rare anomaly, breaking its near-perfect track record. Its upper stage lost the engine during the orbit insertion of SpaceX's own Starlink satellites.