This appears to be a WU issue. I’m not sure when it first started - I’ve got the latest WD files and recently updated Saratoga t the most recent files.
http://support.leuven-template.eu/problems27.php?lang=en
Topmost dated 2017-02-15 Large error message caused by moving the data to a https site,
click on green arrow => Download zip of new version of weather27/usa/noaaDigitalGenerateHtml.php, unzip, and replace current version .