Rainbow shows HTML-<br> in C-Code

[daUser]

Hi,
i use Rainbow for the first Time. Download from the Offical-Homepage (https://craig.is/making/rainbows). I want to use Rainbow for C(C#)-Code in the small CMS "Mozilo".
Rainbow shows on my Code the HTML-Linefeed-Tags (<br>). Screenshot:

Link to the Page: http://www.da-user.de/Technik%2C%20Strom%20%26%20Programmieren.html
Small code excerpt from the MoziloCMS in Mozilocode:

[ueber3|--- more Coderows ---]
[rainbow_CodeHighlighter=C|using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MMDSScv
^{
    class Program
    ^{
(....)
]

[daUser]

Oh, i forgot:
The rainbow_CodeHighlighter-Statement does this:
rainbow_CodeHighlighter = <pre><code data-language="{DESCRIPTION}">{VALUE}</code></pre>