Sorry for the inconvenience. Have to tried basic troubleshooting steps like clearing cache, update from store, uninstall resinstall. Also try connecting to a wifi and check. Do provide your id, ign, game version, device model too.
I believe it could be a problem from your ISP (internet Service Provider), we had an user report this bug before and it turned out to be that his ISP blocked the resources and you couldn't download them. I would recommend maybe delete the game and redownload it and see if that works, if not, you may have to contact your ISP.