Based on your screenshot the port of the Server is suspicious for me. Typically 20000 is a Manager port and not a Server.
Can you please check if any other BIMcloud Basic components runs on this port?
Another idea is that you might configured an external storage as a location of one of the BIMcloud Server folders. BIMcloud Server is not running until it can access all of its folders and files. Take a look on this article too: https://helpcenter.graphisoft.com/knowledgebase/130409/
Also, hosting 4 BIMcloud Basic on one computer might cause troubles on resource side. It is also possible that there is not enough room for the BIMcloud Server to start.
If none of my suggestions or Podolsky's suggestion works, I suggest to contact your support with a BIMcloud Support Package (https://helpcenter.graphisoft.com/knowledgebase/130724/
), marking the installation name of the affected BIMcloud (this case Server-2021-06-29).
Customer Engagement Expert, Community Admin