Unexpected token u in JSON at position

The error "Unexpected token u in JSON at position" typically occurs when parsing a string as JSON and the string is not valid JSON format. The "u" in this error message refers to the first character of the unexpected token.

This error can occur for several reasons, including:

  1. Missing quotes: JSON property names and string values must be enclosed in double-quotes.

  2. Missing commas: JSON objects and arrays must be separated by commas.

  3. Invalid characters: JSON only allows certain characters, such as letters, numbers, and punctuation. Any other characters, such as control characters, must be escaped.

  4. Incorrect data types: JSON only supports a limited set of data types, including strings, numbers, objects, arrays, booleans, and null. Attempting to parse a value that is not one of these data types can result in an error.

  5. If you see the error "Unexpected token you in JSON at position," it signifies that the string-formatted JSON object you are parsing is actually "undefined".

You must check the string to make sure it follows the correct JSON syntax, including the correct use of quotes, commas, and data types, in order to fix this problem. If required, you may verify the string for syntax issues and offer recommendations for corrections using a JSON validator tool.