Can't traverse directories with cyrillic letters in the name (BB-2908)

I can't open directories or files that contain russian letters in the path. E.g.:

https://bitbucket.org/iofik/shad/src/04e49488e122/Семестр4/Лингвистика/task2/words_corpus.py

or

https://bitbucket.org/iofik/shad/src/7fac2a58af9e/%D0%A1%D0%B5%D0%BC%D0%B5%D1%81%D1%82%D1%804/%D0%9B%D0%B8%D0%BD%D0%B3%D0%B2%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0/task2/words_corpus.py