PHP error message....

Today when I load my SuiteCRM install, the login screen loads up and I see the following error message at the top of the web browser and I am unable to login.

Warning: session_start(): open(C:\temp\php\sess_24jai4ih21tt8vd185vqqvi7c1, O_RDWR) failed: No such file or directory (2) in C:\SuiteCRMfolder\include\MVC\SugarApplication.php on line 619

Any ideas on how to fix this? Iā€™m totally lost on what to do.

Thanks in advance for your help!

-Fred