I get Access Denied while viewing asite collection from the browser.

I am site collection administrator and I can open an other site collection in the same content DB

I can do `Get-SPSite` from PowerShell, I tried to do `iisreset` (and also to restart the server).

Where the problem can be?

In the log I see this error:

> 
> Failure while fetching document
> 
> 
>