The element with the surrogate &1 could not be read.
&1 - Surrogate (unique identifier) for the site element (Menu/Frameset/URL/Business Process) which could not be read
A function tried to read information about a site element, but could not read
the data (typically a non existent site element).
This is a message thrown by a low level program - and will typically be followed
by a message specifying the context.
Check the following messages to find out more about the cause of the error.