I reproduced the issue on trusty, and byobu 5.77-0ubuntu1.1 fixed the issue for me. After I upgraded the package, I no longer got the error message when I pressed F5.
I reproduced the issue on trusty, and byobu 5.77-0ubuntu1.1 fixed the issue for me. After I upgraded the package, I no longer got the error message when I pressed F5.