The error that occurs during testing is due to the inaccessibility of the web map being referenced by the Custom Report Template.
When referencing a publicly accessible web map in the report template syntax, the conditional statement is working as expected.
For example:
${if emp_proj =="Normale"}${coord|mapSettings: ”1b959c16af65473aa39cb8f10c37ea0a”:8000|size:400:400}${/}