Plesk mod_fcgid: can't apply process slot for varwwwcgi-bin

How to Fix mod_fcgid: can't apply process slot PHP Error mod_fcgid_ can't apply process slot for _var_www_cgibin_cgi_wrapper_cgi_wrapper mod_fcgid: can't apply process slot for varwwwcgi-bincgi_wrappercgi_wrapper, referer: [Thu Jan 07 10:02 mod_fcgid_ can''t apply process slot for _var_www_cgibin_cgi_wrapper_cgi_wrapper mod_fcgid: can't apply process slot for varwwwcgi-bincgi_wrappercgi_wrapper

mod_fcgid_ can''t apply process slot for can't seem to get rid of it on a high traffic sites mod_fcgid: can't apply process slot for c:php Seems to happen every so