The JavaScript exception "form must be One of 'NFC', 'NFD', 'NFKC', or 'NFKD'" occurs when an unrecognized string is passed to the String.prototype.normalize() method....JavaScript exception "form must be one of 'NFC', 'NFD', 'NFKC', or 'NFKD'"...normalization form should be one of NFC, NFD, NFKC, NFKD. (V8-based)...