But when a SpaceX team pried up the floor, they confirmed there was "contamination," he added.

As it turns out, another Crew Dragon capsule that was launched earlier but is still in space is also dealing with a similar leak.

The capsule that had been used to take professional astronauts to the International Space Station in April, on a mission dubbed Crew-2, experienced similar problems.

NASA still has to give a final OK for that fix, but, all things considered, NASA and SpaceX officials are confident these issues will be put to rest, and this weekend's mission will move forward.

In this case, "that Inspiration4 flight was really a gift for us," said Steve Stich, NASA's Commercial Crew Program manager.

This weekend's flight will mark the fourth SpaceX Crew Dragon mission to carry professional astronauts to the space station as part of a deal SpaceX inked with NASA.