Please ensure that Site Pages feature is activated now: go to the Site settings -> Manage site features -> Site Pages. If not, please activate it manually and try again. Possibly, you just need to wait a bit until those columns appear in the Site Pages library (the columns are added by the Site Pages feature).
If it does not help, may I ask you to create a new site and try to design a form there?
A minor version is not displayed in the designer, that’s why it’s still 1.0.1.