Your page is located outsite a Wappler project definition. Some of the used extensions might not work properly

This seems odd, and different then the other two questions with the same title.

I worked over the weekend to test wappler’s functionality and saved my work constantly as I was using the browser to verify. I closed wappler and went to bed, happy.

When I open wappler, and any of the 6 different projects that I created over the weekend, and for each project I get the error:

Your page is located outsite a Wappler project definition. Some of the used extensions might not work properly.

All the pages work I did in Wappler for testing functionality and layouts seems to have disappeared, but the database connections and server actions are still in the projects.

Am I missing something here? Do the routes and .esj files only survive the active session of working on a project? What do I need to do to save a project to disc and reopen it to work on later?