Cannot add widgets with extension parameters

**Describe the bug**
After creating an account and a room, trying to add widgets from the integration manager that have extension parameters fails. These are widgets like Grafana, Jitsi Meet, Youtube embed, google calendar, and custom widgets. Other widgets like stickers can be added without issue.

**To Reproduce**
Steps to reproduce the behavior:
1. Create account with matrix.org or federated homeserver
2. Create a private room
3. Access integration manager and try to add Grafana, Jitsi Meet, youtube embed etc.
4. See greyed out "add" button and the error "Something went wrong, Failed to load extension parameters." below the description.

**Expected behavior**
Add integrations to rooms by clicking a green "add" button.

**Screenshots**

**Client (please complete the following information):**
- Matrix Client and Version: Element and Element Nightly
- Matrix Client Version: Element version: 1.11.65, Element Nightly version: 0.0.1-nightly.2024050101
- Browser: Firefox
- Browser Version: Element version: 1.11.65

**Additional context**
Tried this with confirmed federated homeserver and with a matrix.org room on both the element desktop client, stable and nightly, as well as element-web in browser. Same behavior across all clients. I can add stickers, bots, and bridges without issue.