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<b>Fatal error</b>:  Uncaught Exception: Warning: SessionHandler::write(): write failed: No space left on device (28) in /var/www/html/vendor/magento/framework/Session/SaveHandler.php on line 139 in /var/www/html/vendor/magento/framework/App/ErrorHandler.php:61
Stack trace:
#0 [internal function]: Magento\Framework\App\ErrorHandler-&gt;handler(2, 'SessionHandler:...', '/var/www/html/v...', 139, Array)
#1 /var/www/html/vendor/magento/framework/Session/SaveHandler.php(139): SessionHandler-&gt;write('ee6867aa756124a...', '_session_valida...')
#2 /var/www/html/vendor/magento/framework/Session/SaveHandler.php(96): Magento\Framework\Session\SaveHandler-&gt;callSafely('write', 'ee6867aa756124a...', '_session_valida...')
#3 [internal function]: Magento\Framework\Session\SaveHandler-&gt;write('ee6867aa756124a...', '_session_valida...')
#4 /var/www/html/vendor/magento/framework/Session/SessionManager.php(151): session_write_close()
#5 /var/www/html/generated/code/Magento/Framework/Session/Generic/Interceptor.php(24): Magento\Framework\Session\SessionM in <b>/var/www/html/vendor/magento/framework/App/ErrorHandler.php</b> on line <b>61</b><br />