Hi , i have added searchboxresource rendering and searchbox rendering to sitecore item presentaion details. Given required properties to searchbox rendering control.I am using coveo cloud with sitecore 8.2
Have you published your site after installing Coveo for Sitecore?
Also, I would suggest to reconnect to the cloud instance by using the Control Panel >> Configuration >> Cloud Configuration menu.
Hello, I run into this exception via a different scenario.
If by any chance, Sitecore is unable to access Coveo when it starts up (typically after an IIS Reset), then I see this exception in the Log. However, even after I fix the connection problems between Sitecore and Coveo, this exception continues to occur and the Coveo Search box or Search page do not come up. The only way to fix it is to restart Sitecore's App Pool in IIS again. Is there a way to prevent this exception from occurring without restarting Sitecore?