A few things you should look into:
- You have some custom JS code that, once every second, modifies HTML elements with ids "htmer_time" and "htmer_time2" to change their content. You need to first check whether those elements exist, because currently they do not.
- I'm assuming you're trying to create these elements through the davwheats ads extension. It looks like your html might be getting escaped, not sure if this is on purpose
- If changing that doesn't fix things, there seems to be an error when booting the asirem theme extension. I've opened a PR here: afrux/flarum-theme-base8, but until that's merged, you can work around it by setting a title/description in the welcome banner, or by disabling the theme.