as i wrote … when the developer have ported this version …
at the moment the community test version is 2.0.2.48.
if you want do install this version you have to follow the instruction that I-was-it linked above.
you install the version 2.0.2.11 and can OTA update to 2.0.2.48.
this worked for me without any problem.
the official jolla version (did not work on fairphone2) is release 2.0.2.51 and is only for the official from jolla supported devices (jolla, jolla c, jolla tablet).
this is the announcement that sverris linked here.
the 2.0.2.51 update via this way is only possible when the community porters update the testing version to 2.0.2.51.
sorry for confusing you …
the error you show here means you have a repository enabled that points to the official jolla store.
the community repository is http://repo.merproject.org/obs/nemo… not https://store-repository.jolla.com/releases…
for the official repository you need an account (and password).