The http://matrix.org homeserver has been struggling with load over the last 24h (thanks perhaps to Slack for driving users our way: https://arstechnica.com/tech-policy/2024/05/slack-defends-default-opt-in-for-ai-training-on-chats-amid-user-outrage/) - we're working on fixing performance. Folks on other homeservers are of course unaffected. Apologies for the inconvenience. https://status.matrix.org is tracking the incident.