The ATO is aware of an issue in Online services for agents where you will receive an error message when selecting to open an activity statement from ‘Not Lodged’ or ‘History’ in the activity statement menu. This issue is also affecting Online services for business. As a workaround, when setting staff Access Manager permissions for activity statements, you also need to give them ‘Revise’ permission to ‘View’, ‘Prepare’ or ‘Lodge’.
They are working to resolve this issue as a priority, and once resolved you can restore staff access to their prior settings.