500Encountered " <IDENT> "lang "" at line 1, column 14. Was expecting one of: <EOF> "," ... "=" ... "?" ... "||" ... "or" ... "&&" ... "and" ... "|" ... "bor" ... "^" ... "xor" ... "&" ... "band" ... "==" ... "eq" ... "!=" ... "neq" ... "<" ... "lt" ... ">" ... "gt" ... "<=" ... "lte" ... ">=" ... "gte" ... "in" ... "not" ... "<<" ... "shl" ... ">>" ... "shr" ... ">>>" ... "ushr" ... "+" ... "-" ... "*" ... "/" ... "%" ... "instanceof" ... "." ... "(" ... "[" ... <DYNAMIC_SUBSCRIPT> ...