EncryptionIndicatorKey is from an untrusted source like forwarded from another user or the online key backup. For this reason we can't verify who sent the message.
The selected server does not support a version of the Matrix protocol that this client understands (%1 to %2). You can't register.
RoomSettingsDialogEncryption is currently experimental and things might break unexpectedly. <br>
Please take note that it can't be disabled afterwards.