Math Processing Error happens for some script

[yrxwin]

I know this is a duplicate issue closed before #35 , but seems the problem has not yet solved. I pulled today and upgraded my discourse, the problem still happens.
The script is: \begin{aligned} 1 + \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots = \prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}, \quad\quad \text{for $|q|<1$} \end{aligned}

[yrxwin]

I searched on web, seems is the problem of ajax runtime. If so, should be easy to fix?