"Explore public room" doesn't load (TypeError: e.instances is undefined)

[alvinhochun]

Description

When trying to list public rooms, the "Explore rooms" overlay doesn't load. Error "Uncaught (in promise) TypeError: e.instances is undefined" is reported on the console.

Steps to reproduce

• Press the "+" sign next to "Rooms"
• Press "Explore public rooms"
• Check dev tools console

The "Explore Rooms" overlay stays loading indefinitely and an error is logged on the console.

Log: not sent

Version information

• Platform: web
• Browser: Firefox 91 (beta channel)
• OS: Windows 10
• URL: both develop.element.io and webchat.kde.org

[t3chguy]

Your server's response is illegal based on the matrix spec which says instances is a required field

This is a Synapse issue matrix-org/synapse#9694

[alvinhochun]

Okay, so what can I do now since this is happening with the kde.org homeserver?

[t3chguy]

Normally I'd suggest to get in touch with the KDE team responsible, so they can open a support ticket with EMS. But I have raised this internally with EMS now.

[Half-Shot]

We're on the case.

[Half-Shot]

This will be fixed in Synapse v1.41.0