Browser: Chrome 110 OS: macOS / Windows / Linux / etc. URL: Link to a page that illustrates this issue Video: Short screen recording that illustrates this issue (free tool: jam.dev)
You’re trying to import a coreframework .core file, which isn’t supported. If you want to import the variables from core framework, copy them from the front end and paste them into the textarea. Then you can export them as json and import them into any other installation. Also, select the “variables” tab, not the classes tab.