Notice error Contribution Aggregate by Relationship report
On dmaster just now (5.28.alpha1):
Notice: Undefined variable: entryFound in CRM_Report_Form_Contribute_History->alterDisplay() (line 842 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/CRM/Report/Form/Contribute/History.php).
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information