Yeah, that’s a tricky one - the sets of characters used by encode64 and url_encode64 are nearly the same, so you got a bad roll of the dice.
I created an issue on Guardian to address / document this:
Yeah, that’s a tricky one - the sets of characters used by encode64 and url_encode64 are nearly the same, so you got a bad roll of the dice.
I created an issue on Guardian to address / document this: