Board Thread:Support Requests - Getting Technical/@comment-24553580-20151010043724/@comment-2170536-20151010070442

I have had to ask for the variables extension to be enabled on every wiki I contribute to. If it is indeed enabled by default now, I would guess that it is for new wikis only, and I would also guess that this change is somewhat recent. Depending on how long the OP's wiki has been around, it may not be enabled there by default.