MathJax does not display the formulas

[verilog15 (verilog)]

I installed the MathJax plugin on my localhost Discourse community. I enabled it in the settings:

But for some reason it does not display the formulas, not in the topics and not in the previous:

The formula I tried:

$$\frac{a}{b} \cdot 5 = 5a\cdot b^{-1}$$

Discourse is set to be in Hebrew (RTL). Maybe that is the reason?
How to solve it?

[jomaxro (Joshua Rosenfeld)]

Works for me on try.discourse.org with both the default locale and user locale set to hebrew.

Are you running other plugins or site customizations?

[Simon_Cossar]

The formula I tried:

$$\frac{a}{b} \cdot 5 = 5a\cdot b^{-1}$$

For inline rendering, you need to wrap the formula in single $ characters.

This is working for me on my local site, with the Hebrew locale:

$\frac{a}{b} \cdot 5 = 5a\cdot b^{-1}$

[verilog15 (verilog)]

I installed the ad plugin but didn’t use it yet. No other plugins or customizations. Any other thoughts about what could be the issue?

Settings of the plugin: