file_id = 'AgACAgIAAyEFAASCtVcOAAMNaDYNPxm2LTl7CmBaDhyeYqvLp-8AAjX6MRv0dbBJeVLqIjZasYEACAEAAwIAA3kABx4E'
It's successfully downloading from bot api
, but your decoding algorithm fails on this file_id, because of insufficient 8 bytes for dialogAccessHash at the end of bytes buffer.
