The broken link (404) message is displayed if the link you have used:
- was copied/ rewritten incorrectly.
- does not exists. Remember that when your study is currently in a draft mode, implementing any changes in your research scheme results in changing the iCode entry link. There is a possibility that you have used the old version of the link (before the changes) and it will be not a valid link anymore.
More information on this issue you can find here.
