Warning: session_start(): open(/var/lib/php/session/sess_3oqqm35i81scs94j3rrgc1b431, O_RDWR) failed: No space left on device (28) in /home/www/circle_production/frontend/securimage/securimage.php on line 1070

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Failed to generate captcha image, content has already been output.
This is most likely due to misconfiguration or a PHP error was sent to the browser.
Warning: Unknown: open(/var/lib/php/session/sess_3oqqm35i81scs94j3rrgc1b431, O_RDWR) failed: No space left on device (28) in Unknown on line 0

Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/var/lib/php/session) in Unknown on line 0