This happens on any file an even just typing "vi" whereas it never happened before. I suspect an update or environment variable is causing this issue
When entering vi I get this weird stuff
E488: Trailing characters: t_Sbet
E171: Missing :endif
When exiting vi I get this weird stuff
/etc/vim/vimrc is bad
I added an endif and also commented out a line that caused the problem and commented the "n't wake up system" portion.
cp /etc/vim/vimrc /etc/vim/vimrc-bad
I am not 100% sure if this harms anything but you can always restore the old/bad file
Find line 58 and replace everything with this:
"set t_Sbet t_Sf
"n't wake up system with blinking cursor:
let &guicursor = &guicursor . ",a:blinkon0"
After setting the above I no longer get that annoying error/text. Clearly some update missed up vimrc