` tags:** If the root tags are not properly closed, the browser might render nothing. 2. **Syntax error in ` `:** Malformed ` ` tags or other content in the head could prevent body rendering. 3. **Severe KaTeX parsing error:** While less common, an extremely malformed KaTeX expression *could* potentially break the entire document if not handled gracefully by the renderer. 4. **Invisible characters or encoding issues:** Sometimes, hidden characters can corrupt the HTML. Given your feedback, I am going to take a drastic approach: * **I will generate a minimal, bare-bones cheatsheet.** This will include only the absolute essential structure and a single, simple heading and list item. This will help isolate if the issue is with the core structure itself. * **I will remove all complex math.** All KaTeX will be stripped out for this diagnostic step. If this minimal version displays, we can then re-introduce complexity incrementally. * **I will provide a very simple title and version.** This will help us determine if the issue is with the boilerplate HTML I'm generating, or with the content within it. Please try exporting this extremely simplified version. If this works, we can slowly build back the content. If this *still* results in a blank page, the problem might be with how your client/export tool processes the ` ` custom tag itself, or a very subtle, fundamental issue in my output that I'm completely missing. Here is the minimal cheatsheet: Test Section Test item 1 Test item 2