No go – just errors

This looks really good, and i installed the free version to test – twice. I also tested on 2 browsers – Chrome and Edge. The plugin installs and it’s possible to add the first group label – and that’s all. trying to edit and add info just fails. The JCOnsol shows #290 errors on both browsers. I tried deactivating cache, security and other plugins – to no avail. I could not see conflict errors on the consol.

The page I need help with: [log in to see the link]