Hi,
The directory that contains the list of workflows won't have the name you defined, they are system generated names.
You will need to go to the Oozie Workflow List in Hue, search by the name and check the workflow's location, then
go to that directory in HDFS.
Like below:
Screen Shot 2018-12-31 at 10.16.15 am.png
Then check the workspace name:
Screen Shot 2018-12-31 at 10.16.43 am.png