Error in &1. Link &2 could not be read.
&1 - Function registering the error
&2 - Surrogate (unique identifier) of the link, that could not be read
A function received a link between two site elements as input, but was unable to retrieve further information about the link.
Use the menu item "Surrogate" in the administration menu to check whether the link exists.
This situation should not occur - as the function throwing the error should only be called from the site structure tree (which shows the registered links as connections between the site elements).