Badly it’s not resolve.
Try many installation.
– go top startup tab, switch the plugin to the left, enter the beta url.
– Try to launch, same message.
– Go to the plugin tab, hit reinstall button, same message …
I observe that the configuration form is always completed with my informations even after new installation
Maybe I need to full delete all older files from the current version, but I didn’t find a way to do this.