I don't understand this theme error?

Would someone be so kind as to decipher this? I don’t know Hugo and I don’t understand what this is telling me:

Theme error: Error building site: failed to render pages: render of “page” failed: execute of template failed: template: post/single.html:73:3: executing “main” at : error calling partial: execute of template failed: template: partials/microhook-after-comments.html:1:3: executing “partials/microhook-after-comments.html” at : error calling partial: “layouts/partials/related-content.html:8:16”: execute of template failed: template: partials/related-content.html:8:16: executing “partials/related-content.html” at <.HeadingsFiltered>: can’t evaluate field HeadingsFiltered in type page.Page

Did you recently change your theme and/or have any customizations to it? That is having an issue with a particular partial in one of MTT’s themes (Sumo, Tiny) that is typically optional. If you changed away from one of those themes but had either customized a bit and/or added a plugin assuming those themes, that could be the problem.

I was updating plugins, but that’s not anything I’m doing specifically. Does this mean TinyTheme no longer works?

I can’t publish this morning, my blog is literally not functioning. I have no idea why.

I think at least one of your plug in updates is not playing nicely with your theme. Without digging into your theme code, it’s hard for me to know what and why things are happening. My advice to at least try and get your blog working is to save whatever is in partials/microhook-after-comments.html in your current theme to a file locally and then deleting that file entirely from your theme. That file not being present should cause your blog to build. You could paste the content of that file here and maybe I could help debug, but unsure.

It was this Tiny Theme Related Content Plugin

Totally broke my blog. My post immediately published and everything settled down when that was removed.

A little frustrated that something like that is in the list of plugins.

The plugin fails for me too, with the error:

Theme error: Error building site: failed to render pages: render of “page” failed: execute of template failed: template: post/single.html:73:3: executing “main” at : error calling partial: execute of template failed: template: partials/microhook-after-comments.html:1:3: executing “partials/microhook-after-comments.html” at : error calling partial: “layouts/partials/related-content.html:8:16”: execute of template failed: template: partials/related-content.html:8:16: executing “partials/related-content.html” at <.HeadingsFiltered>: can’t evaluate field HeadingsFiltered in type page.Page