Tmux 3.0a Configuration Not Loading
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The latest version of Ubuntu has recently been released (20.04 LTS) and along with it comes the latest version of tmux.
Tmux is now at release 3.0a and this version is pre-installed with Ubuntu 20.04 LTS. The problem is, when you want to import a tmux configuration file from tmux 2.9 or below, you get many errors.
The fix for me was simple…
tmux kill-server
Once I killed all old sessions and stopped the tmux server the new tmux version loaded the existing configuration file without any issue or errors.
Seems simple but it took me a few minutes to work it out.