unindent does not match any outer indentation level

This error typically occurs in Python code when there is a mismatch between the indentation levels of different lines or sections of code. In Python, indentation is used to indicate the scope of blocks of code, such as loops, functions, and conditionals. If the indentation is inconsistent, Python will raise an "unindent does not match any outer indentation level" error.

To fix this error, you should check the indentation of your code and make sure that it is consistent throughout. You can use a text editor or an integrated development environment (IDE) that highlights indentation to help you identify any inconsistencies. Additionally, you should make sure that you are using either spaces or tabs for indentation, but not both. Mixing spaces and tabs can also cause indentation errors in Python.