500 Internal Server Error -windows hosting when install wordpress plugins

[LXY]

Hi, my wordpress works fine, but when i install or update the plugin. It displays 500 internal server errors. This is my new site i reset my host, install a new wordpress.and i bought a new theme
When I install plugins they show my mistakes my WP memory limit: 256 MB .PHP time limit: 300.
After installing a part of the plugin to display the error, refresh it already installed the plugin. But when i try to activate it, it also shows my mistake. please help me.
best regards

[Heather]

Hello @LXY!

Thank you for posting! I'm sorry you're having trouble installing plugins to your WordPress. So that the community has a better understanding of what you're facing, can you provide additional information? Which type of hosting plan do you have? Is this a specific plugin? 

[LXY · Accepted solution]

Hi,Thanks for you . I have solved the problem.

I add the code to web.config

<system.webServer>
<httpErrors errorMode="Detailed" />
<asp scriptErrorSentToBrowser="true"/>

</system.webServer>

<system.web>
<customErrors mode="Off"/>
<compilation debug="true"/>
</system.web>

I can see what happens in the end.

the page show me http error .- The FastCGI process exceeded configured request timeout.

OK. I don't know how to login in IIS to Change the MaxTime. So i Change the Php Setting in Plesk.

Run CGI. I looking for no error right now.

can you tell me how to Login in IIS To change the Fastcgi time?

My plane Economy Plane .windows.Thanks!