She should have taken the 5th and walked. They cannot force you to talk. Even with immunity... the individual is the ultimate judge of what they think could incriminate them.
Gangsters think that, but in politics it's damning, and not something you invoke because you feel like it.
She said she respected Barr and accepted what he said. That is very close to a non-answer, which is all the committee deserves.
One could "accept" what Barr said because one believed that nothing would change things, not because one believed that there wasn't election fraud.