PHP Central Europe Conference Canceled Due to Lack of Speaker Diversity

From the article:

“Unfortunately, the organizers indicated they were not open to such an arrangement. According to them, they had only a single woman submit a session proposal this year despite having women present in previous years, and hers was a repeat from a local conference last year. They were also firm that the Call For Papers was done and over and they’re not open to reaching out to new people now. Sadly, from what the organizers told me, they actively don’t want to do outreach.”

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So what are the organizers supposed to do? Have a second Call for Papers with a later deadline, just for women, if the initial gender-neutral CFP did not attract enough papers by women? I think the speakers who reneged on their commitments to speak did the wrong thing, since there is no evidence the conference organizers discriminated against women.