Verificar configuração para criar sala especial de notices
do manual de configuração do synapse:
Config option: server_notices
Use this setting to enable a room which can be used to send notices from the server to users. It is a special room which users cannot leave; notices in the room come from a special "notices" user id.
If you use this setting, you must define the system_mxid_localpart sub-setting, which defines the id of the user which will be used to send the notices.
Sub-options for this setting include:
system_mxid_display_name: set the display name of the "notices" user system_mxid_avatar_url: set the avatar for the "notices" user room_name: set the room name of the server notices room Example configuration:
server_notices: system_mxid_localpart: notices system_mxid_display_name: "Server Notices" system_mxid_avatar_url: "mxc://server.com/oumMVlgDnLYFaPVkExemNVVZ" room_name: "Server Notices"