404 Error After Installing Plugin in WordPress

I have just installed WordPress and activate all the plugins, I have added contact form plugin and found 404 error, I am using managed WordPress web hosting, Should I contact the support team or have any solution here?

Hi,

If you’re receiving a 404 error you will want to contact your web host provider and have them review the WordPress permissions/write-access as they’re probably not correct.

I think your theme is not supporting that plugin, you should contact ***** so that they can resolve your issues.

Hello @alexmorco ,
You just update your permalink settings through the WordPress dashboard