LONDON (AP) — The European Union's digital policy chief warned TikTok's boss Thursday that the social media app will have to fall in line with tough new rules for online platforms set to take effect later this year. EU Commissioner Thierry Breton held a video call with Shou Zi Chew, the CEO of TikTok, the popular Chinese-owned video sharing app that's coming under increasing scrutiny from Western authorities over fears about data privacy, cybersecurity and misinformation. The two discussed the company's plans to comply with the bloc's Digital Services Act, which is set to take effect for the biggest online companies in September.