Now I’m not even sure if there is a later version than what I have as it looks like yesterday there was only a server update.
This fixed the lobby issue for me:
Enter the Lobby screen. Set a server filter to only display servers from a specific region. This should display a list. Now reset your filters. The full list should be displayed.
Source: 🛠 Server Maintenance - Wednesday, April 22 - AoE: DE, AoE II: DE - #34
Please consider this issue resolved.