Board Thread:Support Requests - Getting Technical/@comment-32507313-20170308195854/@comment-9605025-20170310210027

"safesubst" is not a prefix you can append to just anything. The proper syntax is described here. It must be "safesubst:{{#if:" and "safesubst:{{#replace:" because the brackets belong to #if and #replace not safesubst. Otherwise, mediawiki doesn't know what #if and #replace are.