Element-desktop fails with Let's Encrypt root CA

[eravion]

Steps to reproduce

Use Element-desktop 1.9.0 that uses Electron 13.5.0 and try to establish a connection with a homeserver that has a Let's Encrypt certificate

Operating system

MacOS, IOS

Application version

1.9.0

How did you install the app?

.

Homeserver

matrix.ravion.org

Have you submitted a rageshake?

No

[schelmo]

there is a patch release for electron:
https://github.com/electron/electron/releases/tag/v13.5.1
electron/electron#31213

[germain-gg]

Would you be able to share some logs or more information regarding the connection failure?
It will be difficult to investigate further with the current amount of information

[eravion]

there is a patch release for electron:
https://github.com/electron/electron/releases/tag/v13.5.1
electron/electron#31213

it look to be this issue.
This patch is/will be added on element apps ?

[eravion]

Would you be able to share some logs or more information regarding the connection failure?
It will be difficult to investigate further with the current amount of information

In french the message is :
l'URL du serveur d'accueil ne semble pas être un serveur d'accueil Matrix valide.
more or less in English : this URL is not a valid Matrix server
Or something like that.

Nothing on server logs.

[germain-gg]

Right, when trying to load:

• matrix.ravion.org
• matrix.ravion.org/_synapse/admin/v1/server_version
• ravion.org/.well-known/matrix/client
• matrix.ravion.org/.well-known/matrix/client

None of those URLs answer. It appears to be an issue with your Synapse setup rather than an element-web issue.
Will close this issue as there are not much else we can do an our side

[eravion]

The site was down, sorry for that.
Now it is up.
BTW I have the same issue on element to connect to.

[germain-gg]

Same problem arises, none of the URLs that I have tested above work.
I would recommend you go through the install steps again and verify your server side setup

Bonne chance :)

[schelmo]

hi @gsouquet
there is definitly a problem with the switch from letsencrypt. (https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/)
i have currently no access to the windows computer where it happened with element 1.9 to provide some logs
but it was an SSL error (-1 error code iirc)
removing the last block from the new certificate (like mentioned here), fixed the problem for me.
in the linked pull request above from electron, and with the 13.5.1 release, the bug should be fixed.
here is also the correspending electron issues: electron/electron#31212

[eravion]

Hello,
I have the same issue on IOS Apps Version 1.6.1.
May I ask you to confirm ?

[germain-gg]

I will handle the regression on the element-desktop side. However could you open another issue on the iOS bug tracker, https://github.com/vector-im/element-ios