I tried using a different simplified branch name, but still gives a branching error.
Is timer duration [branch] broken in ESP Basic 2.0.Alpha 7, or has the syntax changed?
Timer Example
timer 5000 [do.some.stuff]
print "going to do some stuff in a bit"
button "Click me to exit" [Exit.ThisThing]
wait
[do.some.stuff]
print "Doing Some Stuff"
wait
[Exit.ThisThing]
end