Math error when uploading new styles [themehouse]

[CodyMoores]

As the title says, every time I upload and try a style from theme house I get a math error. For example, when I try and install their "class" theme I get the error shown below. They are compatible with may version of xenforo [1.2.9] so it says but every time I try to upload a style from their site I get this same error. Is it an error caused by me? Maybe a misconfiguration somewhere? Any guidance is appreciated.

An exception occurred: editor_contents.css - Line 80: Invalid math...
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Math error when uploading new styles [themehouse]

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