i have gotten this error now on all my previous working projects.
SDK 8.3
Could not read manifest file 'D:\Project\GitHub Garmin\MitoFlex\manifest.xml': Problem validating the manifest file: cvc-complex-type.2.4.a: Invalid content was found starting with element '{"'">www.garmin.com/.../connectiq":properties}'. One of '{"">www.garmin.com/.../connectiq":products, "">www.garmin.com/.../connectiq":permissions, "">www.garmin.com/.../connectiq":languages, "">www.garmin.com/.../connectiq":trialMode, "">www.garmin.com/.../connectiq":barrels, "'">www.garmin.com/.../connectiq":activityFilter}' is expected.