( ! ) Warning: session_write_close(): write failed: No space left on device (28) in C:\wamp64\www\securimage\securimage.php on line 0

( ! ) Warning: session_write_close(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (c:/wamp64/tmp) in C:\wamp64\www\securimage\securimage.php on line 0

Failed to generate audio file, content has already been output.
This is most likely due to misconfiguration or a PHP error was sent to the browser.