BRUSSELS — A European Union attempt to scan private messages for online child abuse content stalled this week — and all it took was a public outcry by privacy groups, messaging apps from Signal to Elon Musk's X and a crafty email campaign to lawmakers. EU countries this week failed to make progress on a piece of legislation to combat child sexual abuse material (CSAM), casting yet another shadow over the controversial bill. The CSAM proposal, proposed in 2022 , wants to give police more powers