Topic display bug

[Frostbyte]

My topic just display content like this:

Is using NodeBB v1.7.3, Slick theme, Custom Css is Disabled, Composer Default and Redactor.
Thanks for helps.

[PitaJ]

What's the topic source?

[Frostbyte]

The problem maybe i can't activate 'Allow HTML' in Markdown Plugin Settings.
Save Settings button not working and I don't know why!