

I discussed this on the Lemmy issue tracker and the Lemmy devs are not willing to put some standartized restrictions on password composition to ease such interoperability. Thus the only advise I can give is to change your password to not use any obscure non-ascii characters and keep the length below 60 (30?) characters.
We also updated our Photon frontend to the latest 2.0-rc5 just now. Please test and report any issues.