Q: Why has the status of my paper changed directly from 'Reviewer Invited' to 'Ready for Decision'?

It is possible that the reviewers declined the invitation and the editor was unable to find reviewers for your paper. If the subject area of the manuscript is very niche, then suitable reviewers may be difficult to find. Sometimes, when no appropriate peer-reviewers can be found or when no reviewer accepts to review the manuscript, the editorial decision will be final. At this point, the best course of action would be to wait for the decision letter. Once you receive it, things will be clearer. If you don't get the decision letter within a couple of weeks, you can write to the journal.

Related reading:

• What does a status change from "editor invited" to "decision in process" indicate
• Does a direct 'Decision in Process' status indicate rejection?
• Can the status change to "Decision in process" without a request for revisions
• Does the status 'Decision in process' without peer review imply rejection