The Connect Server is only accessible locally on the host
Check the firewall settings of the host on which the Connect Server was installed. Incoming connections may be blocked.
The Connect Server keeps crashing. The error messages indicate an invalid language key
This is a bug in the original version of the .NET 5.0 Framework. Ensure that at least version 5.0.4 of the .NET Framework is installed and that there are no preview versions of Visual Studio 2019 on the host.
The Connect Server is available, but only the text "Loading..." is displayed without the page being loaded.
Please check whether the browser you are using is able to interpret WebAssemby. For Chrome, for example, at least version 57 is required.
Analysis of various UI problems
If the frontend reports that an error has occurred, you can press F12 in a Chromium-based browser (e.g. Chrome or Edge) to open the developer tools. Error messages can be viewed in the "Console" tab.