Facebook has been alleged to block an ad which seemed to portray Tess Holiday, a plus sized model in a bikini. The company apologised to the group that was responsible for the ad, a feminist Australian group.

The group, named Cherchez La Femme, was told by the social media network that the company’s rules and regulations did not allow depiction of particular bodies as being “perfect or extremely undesirable”, on the health and fitness ads they allowed on the site. This was according to a screenshot that was posted by the group on their page.

In the message, a Facebook representative wrote that these types of ads would make people feel bad about themselves. Facebook instead suggested that the group make an ad of someone running or riding a bike, which would be much more acceptable.

The ad that caused the controversy had been designed to help with an event the group is hosting called “Feminism and Fat. Apparently, according to a spokesperson for the group, the model in question had not approved the photo for use in the ad. The group did, however, say that they had tried to contact her prior to putting the image on their ad.

Facebook reversed their decision hours after the group had posted the response from Facebook, and the company apologized, saying the rejection was a mistake. The group’s producer said the apology was not enough for the group and they wanted to see the social media network take more action.

A Facebook rep said in a statement:

Our team processes millions of advertising images each week, and in some instances we incorrectly prohibit ads. This image does not violate our ad policies. We apologize for the error and have let the advertiser know we are approving their ad.