zoo() object expecting DataFrame instead of tibble

[EvanFalcone]

Running ga-dashboard-demo, I was getting an error at line 178 of server.R: the zoo() object created was expecting a DataFrame instead of a tibble. See the following related StackOverflow post:
https://stackoverflow.com/a/42645170

Though perhaps not the best solution, under line 178 of server.R, I added an explicit coercion to DataFrame:

agg_data <- as.data.frame(agg_data)