Cancelling "Edit permissions" leads to 404 error

Steps:

1. Go to "https://sandbox.genesys-pgr.org";
2. Save at least one list of accessions
3. In the My List page navigate to the "Accession list" tab;
4. Click on the "Saved lists of accessions" drop-down;
5. Select saved list;
6. Navigate to the "Accession list" tab;
7. Click on the "EDIT PERMISSIONS" button;
8. Click on the "CANCEL" button;

**Act. res.:**Cancelling "Edit permissions" leads to 404 error. See attached video: