Having issues activating after updating SCA to 2019.3 and deploying. Extensions don't show in the list and even trying to activate the theme only causes the error "Cannot read property \"manifest_id\" from undefined". We have changed the target versions for extensions to SCA": ">=19.2.0",
"SCS": ">=19.2.0", the theme already had those as the target. All touchpoints are in place. What are we missing?