141: Invalid sandwich markup

A slash / at the start of a line introduces sandwich markup. Sandwich markup looks like /prefix/delimiter and causes the Aneamal Translator to prepend every line with prefix until it gets to a line that only contains delimiter. The second slash required for sandwich markup is missing in your case.

Solution

Add a backslash before the slash, if you do not want to use sandwich markup at all and instead want to have a literal slash at the beginning of a line: \/

Otherwise add the second slash between prefix and delimiter in order to use sandwich markup.