Hi,
I am upgrading a solution from 7.5 to 11. So far I have got the solution working fine in version 10.10.4.
When trying to upgrade further to 11.3.2, I keep getting the classical "This request has probably been tampered with. Close the browser and try again.", with irregular intervals on localhost.
I am also trying to upgrade from MVC 4 to 5 when moving from v 10 to 11.
Has anyone experienced the same when upgrading to v 11 and found a solution?