Please do not download and install a Storeman RPM file manually, unless you want to test a Storeman pre-release (this is the only purpose Storeman’s RPM files offered at GitHub have): Storeman’s self-updating will not work, i.e. you will not be notified about newer Storeman releases and cannot download and install them using Storeman.
I have an idea for a workaround in Storeman’s spec file to alleviate this, but you will need to install a newer, future Storeman release first for Storeman’s self-updating to work when Storeman was manually installed.
[Storeman] installer does not support beta releases and since this isn’t even a beta it’s not working as expected.
This is no longer true when using Storeman Installer ≥ 2.2.6 on SailfishOS ≥ 4.6.0, because it utilises SSU’s new release string RPM macros introduced by SailfishOS 4.6.0. Before that this was impossible to achieve: Actually the statement “installer does not support beta releases” was never true, it was Jolla’s SSU and SailfishOS-OBS making it impossible to support cBeta and EA releases of SailfishOS by the Installers for Storeman and the SailfishOS:Chum GUI app.
I plan to update the instructions when I have some time for that.
Yes, I was a bit slow to configure Storeman’s download repository at SailfishOS-OBS for SailfishOS 5.0 (I did that after 5.0.0.21 was released), because nobody filed an issue at GitHub (and I usually do not read FSO-threads about the Jolla C2, because I do not have one), but since then Storeman Installer ≥ 2.2.6 should be working fine on any SailfishOS 5.0.x.y release including 5.0.0.5 (but I suggest to update SailfishOS first after successfully executing Jolla’s initial setup dialogues).
TL;DR
If you have downloaded and installed a Storeman RPM file manually, and you do not fully comprehend or want to avoid the implications not using the Storeman Installer has, please remove (“uninstall”) Storeman (e.g. by executing devel-su pkcon remove harbour-storeman) and use the Storeman Installer.
P.S.: If you experience issues with Storeman or its Installer, please do file an issue at the corresponding GitHub repository.
P.P.S.: See also my follow-up messages Feedback on Jolla C2 - #605 by olf and Feedback on Jolla C2 - #607 by olf.