Somewhere in the last couple weeks, possibly from an update... All of my fields set up in the Builder have disappeared. I now just get "There are no fields here. Click the + Add Field to add a new field." Here is the json export, which still contains the data: https://pastebin.com/LtA8dw1w
The fields are for a custom post type and I am also using conditional logic. Let me know if you need any additional data to look into this.
I have tried with all plugins disabled except for Metabox and Metabox builder.
Thanks for the help!