The user simonfen reported that the ‘Build Poll’ option is missing from the topic settings, even for admin and moderator roles. Moin identified the issue as a broken menu, likely caused by the deprecated ‘Canned Replies’ plugin, and suggested checking the browser console for errors. simonfen confirmed that disabling the ‘Canned Replies’ plugin resolved the problem. Arkshine noted that the plugin is deprecated and recommended using the ‘Discourse Templates’ plugin instead.
Looks like the menu is broken. That happened to others recently too. Can you check your browser console (right-click on the page → inspect → Console tab)? I guess you will see something like
I noticed you have the canned replies plugin still installed. It is deprecated and breaks that dropdown. Does it work again when you disable the canned replies plugin?