Can I sell stickers from Flaticon?

Excuse me, I'm considering selling stickers that I've found on Flaticon, a popular icon and sticker platform. However, I'm not entirely sure if it's permissible to do so. Could you please clarify if it's allowed for me to purchase, customize, and subsequently sell stickers obtained from Flaticon? Are there any legal implications or licensing issues I should be aware of? Additionally, if I'm required to obtain permission, what steps should I take to ensure that I'm compliant with Flaticon's terms and conditions? Your insight into this matter would be greatly appreciated.