She had to acknowledge that her mistake was her fault.

to recognize the existence or truth of something
Please acknowledge receipt of this email.
I acknowledge your help.
He acknowledged the crowd's cheers.
acknowledge receipt
acknowledge a mistake
acknowledge the truth
accept
recognize
admit
Please acknowledge your receipt of this important document.

to express gratitude or appreciation for something
I acknowledge your help.
She acknowledged the gift.
He acknowledged his mistake.
acknowledge receipt
acknowledge thanks
acknowledge error
appreciate
recognize
accept
Please acknowledge my presence when you arrive.

To recognize the existence or truth of something, often in a formal or polite manner.
I acknowledge your help.
She acknowledged the mistake.
They acknowledge the new rule.
acknowledge receipt
acknowledge the fact
acknowledge someone's presence
admit
recognize
accept