VATICAN CITY (AP) — A founding member of Pope Francis’ child protection advisory board resigned Wednesday, citing a host of problems inside the commission and in its relationship with the Vatican bureaucracy.

In an unusually frank resignation note, the Rev. Hans Zollner cited inadequate financial accountability, insufficient transparency about decision-making and a lack of clarity about staff hiring and the board’s relationship with the Holy See’s sex abuse office.

Francis announced the creation of the Pontifical Commission for the Protection of Miners in 2013 to advise the Vatican on best practices to prevent clergy sexual abuse. He named Boston Cardinal Sean O’Malley as the commission's head.

The board has gone through several iterations since then, most significantly when another founding member, Irish abuse survivor and advocate Marie Collins, resigned in frustration in 2017 over Vatican stonewalling on the commission’s proposals.

Zollner’s departure suggested a similar, but broader degree of frustration that touched on internal governance issues as well.

He pointed to a difficult relationship with the Dicastery for the Doctrine of the Faith, which since 2001 has processed all sex abuse cases around the globe. The former Holy Office jealously guards its turf,and is known for its centuries-long tradition of secrecy and its unwavering crackdown on dissidents and heretics.

The office also was known to be less-than-enthusiastic about proposals put forward by the commission or requests for cooperation. Last year, Francis nonetheless placed the commission, which had existed as an ad hoc body that reported directly to the pope, inside the Dicastery.

At the time, O’Malley said the move would give the commission more institutional weight in the Vatican. But Zollner complained that nearly a year later, there were still no regulations governing the relationship between the two entities.

Zollner, a German Jesuit and psychologist, heads an academic institute at the Pontifical Gregorian University that trains church personnel in child protection strategies. The institute recently beefed up its mandate and now awards academic degrees in safeguarding.

Zollner was also recently named as a consultant to the Diocese of Rome to improve its child protection policies.

In a statement announcing the resignation, O’Malley suggested Zollner was leaving because of the new Rome appointment and “all his other responsibilities.” The cardinal did not mention the “structural and practical” issues.

O’Malley praised Zollner’s dedication to the cause of child protection, noting his global travel to train church personnel.

“He has become an ambassador for safeguarding and will continue to be a constant presence in this important work,” O’Malley said.

In his statement, Zollner said his resignation was accepted on March 14. There was no explanation for the delay in the announcement.