Error when connecting on account that hasn't joined rooms yet

[Kabouik]

I was very happy to find an emacs package for Matrix so I immediately installed it from list-packages, but I am getting the following issue when running ement-connect:

Ement: Response arrived after 30.21 seconds.  Reading 795 JSON response...
Ement: Reading JSON took 0.00 seconds
Ement: Reading events... 
Ement: Sync request sent, waiting for response...
error in process sentinel: taxy-magit-section-format-header: Invalid format operation %n
error in process sentinel: Invalid format operation %n

This is on Guix system, and I get the same error after trying to uninstall emacs-magit. I have tried both emacs-magit@3.3.0-2.c883fab and emacs-magit@20230125.1440, same symptoms.

The only way I can install ement-el is from list-packages because the version on Guix seems to have dependency conflicts. However, when I install it, I get the above error, but also other ones when I restart emacs

Unable to activate package ‘transient’.
Required package ‘compat-28.1.1.0’ is unavailable
Unable to activate package ‘taxy-magit-section’.
Required package ‘magit-section-3.2.1’ is unavailable
Unable to activate package ‘taxy-magit-section’.
Required package ‘magit-section-3.2.1’ is unavailable
Unable to activate package ‘ement’.
Required package ‘taxy-magit-section-0.12.1’ is unavailable

[alphapapa]

Hello,

Although I'm glad to have Ement in Guix, I can't offer support for that packaging, because I have no control over it. I recommend installing the required packages directly from GNU ELPA into a clean Emacs configuration, e.g. using https://github.com/alphapapa/with-emacs.sh. If you do that, it should work.

[oantolin]

For what it's worth, I get the same "error in process sentinel: Invalid format operation %n" when trying to use ement.el. I installed it with package-install and do not use Guix. I tried in emacs -Q, running M-x package-initialize and then M-x ement-connect and get the same error. I'm new to matrix, so I'm possibly screwing up with what "user ID" means, I think it is of the form @username:server.tld (and I made my account on :matrix.org as I gather most people do). I have Emacs 28.1 running in WSL, and ement 0.5.2

[oantolin]

Oh, here's a clue: I had initially tried to use ement.el right after creating an account, before joining any rooms. That's when I got the %n error. So next I joined a room using a different client and then tried to log in with ement.el again and this time it worked. So maybe it's a bug triggered by an empty room list?

[alphapapa]

Oh, here's a clue: I had initially tried to use ement.el right after creating an account, before joining any rooms. That's when I got the %n error. So next I joined a room using a different client and then tried to log in with ement.el again and this time it worked. So maybe it's a bug triggered by an empty room list?

Yes, that's likely the case. I haven't tested logging in on an account that hasn't yet joined any rooms.

[Kabouik]

I think you're right @oantolin: my use case was also with an account not in any room yet, and I believe this very error message vanished when I joined a room using the Element web UI first. I didn't notice that initially because I was still experiencing some other issues which I thought were all related, and I wanted to give troubleshooting a little more time before reporting here, to determine whether those issues would be related to my system or to ement.el.