can't search 'doge' from HistoricalTransactions()

[HoMengHsuan]

Hi, when I try to use the HistoricalTransactions() function to search 'doge' the result didn't show up, but I try 'btc' it works, wonder if there's any bug or something I miss?

from moneywagon import HistoricalTransactions
x = HistoricalTransactions().action('doge', 'myaddress')
print(x)