What could be causing the JSON Parse Error in the provided PHP code?

The JSON Parse Error could be caused by invalid JSON data being passed to the `json_decode` function in the provided PHP code. To solve this issue, you should first ensure that the JSON data being passed is valid. You can also use the `json_last_error_msg` function to get more information about the error that occurred during the parsing process.

// Check if the JSON data is valid before decoding
$jsonData = '{"key": "value"}'; // Example JSON data
if (json_decode($jsonData) === null && json_last_error() !== JSON_ERROR_NONE) {
    echo "JSON Parse Error: " . json_last_error_msg();
} else {
    $decodedData = json_decode($jsonData);
    // Use the decoded data here
}