Hi,
I have installed "ABAP Platform Trial 1909" using the Docker image, following these instructions: https://hub.docker.com/r/sapse/abap-platform-trial
Then I have installed Eclipse and the plugin "ABAP Development Tools" (ADT).
Then in Eclipse I have created a new ABAP project.
I get a first error message:

If I press OK I am able to manage the connection settings as described in above link.

NB: I tried several values for Application Server: "localhost", "127.0.0.1", and "vhcala4hci" after having completed the hosts file with these additional lines:
# SAP System A4H Developer Edition on Docker<br>127.0.0.1 vhcala4hci<br># End of section
Below the next screen for the connection settings:

OK now I am able to create my first ABAP program:

But when I try to execute the program, I get the following error: "Failed to create the part's controls".

And I get this message in the error log: "The SapGuiServer path could not be determined".

I don't know what to do. Any help would be much appreciated.