I’m getting same issue
Hi there! Good to see you exploring the Mendix low code platform.Sad to see you ran into an error. Best start over, click New App, search ‘Native’ and click this one:
This will take a minute or so and you will have a working version of Mendix. Version 8.17.0
Also good to know for people like you, exploring Mendix, is that Mendix Studio Pro has so much more options compared to Studio, which is only recently created for ‘Citizen Developers’
Hi Valentina and Tien,
You can import the missing widgets from the appstore. For more info see https://docs.mendix.com/studio8/page-editor-widgets#6-adding-the-app-store-widgets
Also if possible you can exclude the the pages from the project if you are not using them. Mendix won't use excluded items for consistency checks.