Add missing init for the GetProductDetails method. (#2235)

Fixes
[AB#551407](https://dynamicssmb2.visualstudio.com/1fcb79e7-ab07-432a-a3c6-6cf5a88ba4a5/_workitems/edit/551407)

src/System Application/App/AppSource Gallery/src/AppSourceProductManager.Codeunit.al

@@ -222,6 +222,7 @@ codeunit 2515 "AppSource Product Manager"
     var
         RequestUri: Text;
     begin
+        Init();
         RequestUri := ConstructProductUri(UniqueProductIDValue);
         exit(GetProductDetails(UniqueProductIDValue, RequestUri));
     end;