"Processing error message" is a predefined property containing a textual description of an error and is provided by Semantic MediaWiki. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.
C
"No, In progress" is not recognized as a Boolean (true/false) value.
K
Property "Skills" (as page type) with input value "Leadership skills
Sustainable planning
Woodworking" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
Property "Interests" (as page type) with input value "Sustainable living
Hiking
Reading" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.
L
"Fair use screenshot of cover of newspaper." is not in the list (CC-BY-SA-4.0, CC-BY-SA-3.0, CC-BY-SA-2.0, CC-BY-NC-SA-4.0, CC-BY-NC-SA-3.0, CC-BY-NC-SA-2.0, CC0-1.0, CERN-OHL-S, MIT, GPL, ...) of allowed values for the "File license" property.
M
The following coordinate was not recognized: Geocoding failed.
The following coordinate was not recognized: Geocoding failed.
R
The following coordinate was not recognized: Geocoding failed.
V
The following coordinate was not recognized: Geocoding failed.