LaTeX - \underbrace nor \overbrace are rendering properly

[mattiasJohnson]

Describe the bug
The LaTeX commands \underbrace{a}_{b}, \overbrace{c}^{d} are not rendering properly. They succesfully place the expression under (or over) but the braces do not render.

To Reproduce

1. Insert the LaTeX code

$$
\underbrace{a}_{b}
$$

respectively

$$
\overbrace{c}^{d}
$$

2. Render page and observe that there are no brackets.

Expected behavior

---

\underbrace{a}_{b}

Succesful rendering from KaTeX.org:

Failed rendering in wiki.js:

---

\overbrace{c}^{d}

Succesful rendering from KaTeX.org:

Failed rendering in wiki.js:

---

Host Info:

• OS: Ubuntu 18.04, Docker
• Wiki.js version: 2.1.114
• Database engine: postgres 11.6

Additional context
I have no idea how the KaTeX module works but could I be missing some fonts locally perhaps or would it be related to how the module is implemented in wiki.js?

[NGPixel]

You need to disable HTML Sanitization under Admin > Rendering > HTML > Security, then re-save the page again.

I'm still investigating why the sanitizer breaks katex but disabling the option should fix your issue.

[NGPixel]

Fixed by 830f516