Are you able to share the playbook you are trying to run, the issue you are seeing is that Ansible is trying to throw an exception because it failed to send the module data to the Windows host but because of an encoding issue it isn’t showing you the actual error. We just pushed a fix to work through this issue which should let you know more info as to why it failed https://github.com/ansible/ansible/pull/39333. You can test it out by running from the devel branch of Ansible and it will display the stderr received from the host.
Are you able to try out the stable branch, there was a change there to fix that encoding issue, it should narrow down exactly what is going wrong. To test it you run the following;