An invalid value was passed to a ++ option modifier (e.g. ++enc=, ++ff=) on a file command such as :e or :w. Check that the encoding name or file format is valid.
E262
vim An invalid value was passed to a ++ option modifier (e.g. ++enc=, ++ff=) on a file command such as :e or :w. Check that the encoding name or file format is valid.