IIS 7 and Above
Who to contact for FastCGI support?
Re: Who to contact for FastCGI support?
Apr 24, 2017 06:32 AM|Yuk Ding|LINK
The error message show that an error/ crash occur when The fast-cgi module is executing the wordpress site. So the error could probably caused by either IIS fast-cgi configuration or wordpress web application itself. Enable the 32-bit application in IIS
application pool advanced setting to rule out whether the 32-bit a application casued the error. Then you may need to check whether you have enabled the wordpress and PHP fast-cgi correctly: