Hi,
Several users have mentioned they sometimes get "stuck" in the following use case :
- connect to the application (v9.5.5)
- hit "back" in the browser (by accident) => goes back to the browser's home page
- click "forward" in the browser to try to get back to the application
- => message "you are already connected in another tab"
The only way out seems to be clear cache.
Not sure if this is always reproducible, but perhaps a "clean" disconnection could be forced somehow ?
Hint : if you are sure not to have another tab opened on projeqtor, double click on the message 😉