Error: An error occurred while sending the request.
The underlying connection was closed: An unexpected error occurred on a receive.
Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.
An existing connection was forcibly closed by the remote host
I dit not say that you should start something called Development Administrator.
Start the Business Central Application windows program,
In console root window to the left click on BC130
Find the fasttab Development
Click on EDIT
Enable the field: Enable Loading Applicaiton symbol references at server startup
Click on SAVE
Restart the servicetier.
Also how did you start the docker container?? You have been around for a long time so you should really know that the more information you provide the better and faster answer you get…