156: Invalid math module

Mathematical formulae are usually written with LaTeX commands and set between $…$ within a paragraph or between $$…$$ as an own block which can use more space. A math module is needed to display them beautifully. While the file /aneamal/math/index.php which is expected to contain a math module exists, that file does not communicate how a math module is supposed to communicate with the Aneamal Translator.

Solution

You can find valid math modules here. Use one of these.