Latex format issue with begin and end tag: Parser Error: Undefined control sequence \

[dkliss]

The package is unable to handle latex example format like below. Was wondering if this can be fixed, Thanks! Or an guidance on how to fix, i can do it myself. I receive

\begin{equation}
\delta(x) = \begin{cases}
\infty, & \text{if } x = 0 \\
0, & \text{if } x \neq 0
\end{cases}
\end{equation}