FATAL ERROR

Hello
Everything was working without any problems and today when i try to connect :
It’s appear :
Fatal error: Uncaught Exception: Cannot open source device in /htdocs/ERP/htdocs/main.inc.php:227 Stack trace: #0 /htdocs/ERP/htdocs/main.inc.php(227): session_start() #1 /htdocs/ERP/htdocs/index.php(29): require(’/htdocs/ERP/htd…’) #2 {main} Next Exception: Cannot open source device in /htdocs/ERP/htdocs/main.inc.php:227 Stack trace: #0 /htdocs/ERP/htdocs/main.inc.php(227): session_start() #1 /htdocs/ERP/htdocs/index.php(29): require(’/htdocs/ERP/htd…’) #2 {main} Next Exception: Cannot open source device in /htdocs/ERP/htdocs/main.inc.php:227 Stack trace: #0 /htdocs/ERP/htdocs/main.inc.php(227): session_start() #1 /htdocs/ERP/htdocs/index.php(29): require(’/htdocs/ERP/htd…’) #2 {main} Next Exception: Cannot open source device in /htdocs/ERP/htdocs/main.inc.php:227 Stack trace: #0 /htdocs/ERP/htdocs/main.inc.php(227): session_start() #1 /htdocs/ERP/htdocs/index.php(29): require(’/htdocs/ERP/htd…’) #2 {main} Next Error: Failed to create session ID: files (path: /var/www/encartpro.com/tmp/.php-session) in /htdoc in /htdocs/ERP/htdocs/main.inc.php on line 227

Is somebody know what i need to do ?
thanks for help in advance

I MIGHT BE WRONG but it could be that your temp folder on your server is full and needs emptying. Check with the hosting company.