After the last update of the Make It Native app on 29th of March 2023 the app cannot load the projects on all Mendix 9 versions anymore. You get the error: 'Version not supported’. According to a review by Sjors S. you can now only use this app for projects in Mendix 9.24. Please make this app available for all projects in Mendix 9 again.
Agreed, and while I understand that Mendix possibly wants to encourage everyone to update to a LTS release as soon as possible, it's very bad practice to make this kind of software not backwards compatible and enforce an application update.
By the way this is also confirmed by Mendix in the Studio Pro 9.24 release notes:
We updated the Make It Native app to make it compatible with this Studio Pro version. This means it is no longer compatible with older Studio Pro versions. We recommend upgrading your app to 9.24 or building a custom developer app.