MOSCOW, June 9 : Russia's digital ministry said on Tuesday it had asked law enforcement to support lifting a ban on the U.S. gaming platform Roblox RBLX.N, based on assurances that the company would provide extra protection for young users and comply with Russian law. The communications watchdog Roskomnadzor announced the ban last December on grounds of child safety, annoying some Russian users and even sparking a rare protest in the Siberian city of Tomsk. "In connection with the guarantees of