decrypt data encrypted by CI 2.4 with CI 3.1

Thank you for your feed back. Unfortunately, this does not work

I installed this library and I used it like

$this->my_legacy_decrypt->blowfish_cbc_decrypt($encoded,$key);

the result was some weird chars like A`p�
Fp�aĸ��s��ݥ��, possibly binary (previously I got empty strings only)

Any idea?