Wondering if you can offer any help.
I have a SharePoint 2013 environment that is displayed "Sorry, you don't have access to this page" to all users when trying to access any part of a site across multiple site collections.
I am currently signed in as the farm admin account and I also get the same issue.
I cannot see anything untoward in the ULS logs, the servers have been restarted we have checked all application pools, services and IIS however the error continues to be displayed.
This farm is a single server farm with multiple web applications however this is happening on one web application across multiple site collections.
Any help would be greatly appreciated.