is that the plugin takes advantage of the method suggested by unraid, at startup, which is exactly what you don't want, so you can use other alternatives, such as user script, there you can install in another startup stage, such as the array
This is solved, close all tmux windows, add that line to the .tmux.conf file and open it again and it works mc
echo "set -g default-terminal 'linux'" >> .tmux.conf
I am going to install it in a clean installation, I have done the same procedure as you, but some other plugin may have installed some extra dependency