What does "red cross" mark in "services" tab means?

Hello Alexryshkov72, the mark you mentioned means that the service is unavailable now. The details should be displayed on the right when you select the service; for example, you should see the following when the docker is not running:

I have Docker running and the containers. I can access my app in the browser. However, as above, when I inspect the services window for Docker, I see the same as above, red x over the container images. How can this be so?

Hello, andrew_mark_uk. Could you please share the screenshot displaying the services and your IDE logs (Help | Collect Logs and Diagnostic Data)? I want to check if any related errors are reported there. 
You can share the logs using the JetBrains Uploads service and write the ID you receive here.