Following criticism over a letter of support to a judge following Danny Masterson’s rape conviction, Ashton Kutcher has resigned from the foundation he founded to combat child sexual abuse.

In his resignation letter to Thorn, Kutcher stated that his support letter was a “error in judgement.”

Masterson was sentenced to prison for 30 years to life for raping two women.

Kutcher’s wife, actress Mila Kunis, issued a similar letter.

Victims and advocacy groups were outraged by the letters and subsequent apology from Kutcher and Kunis, who co-starred in That 70s Show with Masterson.

Kutcher stated in a resignation letter to Thorn’s board that was released online that his decision to step down from the board is “rooted in the recognition of recent events.”

“After my wife and I spent several days of listening, personal reflection, learning, and conversations with survivors, employees, and leadership at Thorn, I have determined that the responsible thing for me to do is resign as chairman of the board, effective immediately,” Kutcher wrote in his resignation letter.

“I cannot let my blunder detract from our efforts and the children we serve,” he added.