Information on why Clan Leadership may have been lost

Unable to switch regions in Diablo III.

Had gems socketed into gear yesterday but they are gone today

What to do when you completed the criteria and can't complete the Achievement

What to do if you are unable to hand in this quest and Moira Thaurissan is missing.

What to do if you can't find the next quest for the Children's Week questline

What to do if you cannot use the teleporter to the Chamber of the Heart.

What to do if one or more of your Diablo II: Resurrected characters are missing

Troubleshooting "Not Available While Initializing Game Mode" error in Starcraft II and Heroes of the Storm

What to do if a tome is claimed but the option to pick the mini to upgrade is not given.