Found in betalabs when checking T222124. When loading, Special:Homepage displays the following Console error:
TypeError: data.homepagequestionstore.questions.forEach is not a function
The error points to :
data.homepagequestionstore.questions.forEach(function (questionRecord) { if (questionRecord.isArchived) { archivedCount++; } else { unarchivedCount++; }
The error seems to be displayed on every Homepage (not only for users who had archived/unarchived questions).