Issues with Wisej package deployment

Hello,
we followed the procedure described in https://docs.wisej.com/deployment/targets/nginx to deploy our Wisej application:

• The application builds and runs fine in a local debug session.
• published the project as a self contained package for a linux environment.
• All files (from the publish folder) are in place and readable on the server.
• nginx config contains the proxy_pass statement pointing to the correct URL.
• The web.config contains a valid server license.
• The application (dotnet …) starts successfully. ASP.net writes log output to the console. tcpdump shows a process with a port.
• Request for http://…/healthcheck.wx is successful so server connection seems to be fine.

Now, when we start the application in the browser it always ends with an exception in some constructor of a Wisej.Web.Control class trying to execute get_DefaultMargin() call. We tried different dummy pages with very simple controls but the exception remains. I’ve posted a picture of the exact error message below.

Any help is appreciated.