Cannot connect to RabbitMQ

[cwidisgroup]

Installed everything according to the instructions. Attempting to start VolCap on the central machine (which is called topinambur): it crashes straight away without any message.

Opened a RabbitMQ command prompt. It seems there is a problem with connecting to the rabbitMQ server:

C:\Program Files\RabbitMQ Server\rabbitmq_server-3.11.16\sbin>rabbitmqctl.bat status
Error: unable to perform an operation on node 'rabbit@topinambur'. Please see diagnostics information and suggestions below.

Most common reasons for this are:

 * Target node is unreachable (e.g. due to hostname resolution, TCP connection or firewall issues)
 * CLI tool fails to authenticate with the server (e.g. due to CLI tool's Erlang cookie not matching that of the server)
 * Target node is not running

In addition to the diagnostics info below:

 * See the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more
 * Consult server logs on node rabbit@topinambur
 * If target node is configured to use long node names, don't forget to use --longnames with CLI tools

DIAGNOSTICS
===========

attempted to contact: [rabbit@topinambur]

rabbit@topinambur:
  * connected to epmd (port 4369) on topinambur
  * epmd reports node 'rabbit' uses port 25672 for inter-node and CLI tool traffic
  * TCP connection succeeded but Erlang distribution failed
  * suggestion: check if the Erlang cookie is identical for all server nodes and CLI tools
  * suggestion: check if all server nodes and CLI tools use consistent hostnames when addressing each other
  * suggestion: check if inter-node connections may be configured to use TLS. If so, all nodes and CLI tools must do that
   * suggestion: see the CLI, clustering and networking guides on https://rabbitmq.com/documentation.html to learn more


Current node details:
 * node name: 'rabbitmqcli-870-rabbit@topinambur'
 * effective user's home directory: c:/Users/dis
 * Erlang cookie hash: bezvwVB7D8f7RbNZ/T5bSg==


C:\Program Files\RabbitMQ Server\rabbitmq_server-3.11.16\sbin>

Double-checked that the firewall settings are correct, and they seem to be (port 5672 and 15672 are open).