« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
PHP error debug
Error:	Unknown: open(/tmp/sess_7b4cf7bafd2ebf559ecf060209170b40, O_RDWR) failed: No space left on device (28)
Error type/ Nr.:	Warning - 2
File:	Unknown
Line:	0
Parser timing
MySQL:	0.0159 s	(13 Requests)
PHP:	3.7038 s
Total:	3.7197 s