Given that the tag in the image mentions bitbucket-unknown-hosting-type, this suggests that the system may be confused about whether you are trying to access Bitbucket Cloud or Bitbucket Data Center.
If it's Cloud: Try creating it directly via the link bitbucket.org/create/workspace.
If it's Data Center: You don't create "Workspaces," but rather "Projects." Check if you have the "Project Create" permission assigned by your administrator.
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