Login into the developer of Arcgis. Want to create my first app. When I finish to fill in the title/tag/description, the "register new application" is grey. I cannot click this button. I just wonder what is the problem for this issue? How can I register my app in Arcgis?
Do you want to use web appbuilder for ArcGIS? Make your first app—Web AppBuilder for ArcGIS | ArcGIS
Also see Register an app—ArcGIS Marketplace Help | ArcGIS