74: Metadata name missing

You started a line in your document with a squirrel @, which marks a metadata declaration. However, your line does not contain a metadata name before the first colon :, which separates the metadata name from its assigned value.

Solution

If you meant to declare metadata, please check that it has a name, followed by a colon and a value assigned to the name.

If you did not mean to declare metadata but want to start the line with a literal @ sign, you can prepend it with a backslash: \@