Jim Klocke, CEO of the Massachusetts Nonprofit Network, said he isn't sure how many charities were affected, but he called the glut of revocations "a very serious issue that needs to be resolved by the IRS immediately."

"We’re heading into the final two months of the year's fundraising season, which is always an important time of year for nonprofits," he said. "And this year fundraising is more important than ever, especially for groups that are helping people affected by the pandemic."