Open an individual target in the current sheet, then click on "Show Previous" and a new column will open. You can copy the text directly from the column and paste it into the column next to it. When you switch from MidYear to YearEnd, they will be pre-filled for you.

HR will then manually open a sheet for you. Please open a ticket at the helpdesk for the reason "Self Service HR".

Use the EDIT button. This opens the target and makes it editable. Save your changes afterwards.

Refresh the page with F5 or clear your cache with CTRL + F5. After that, no more errors should appear.

Please open a ticket for Self Service and describe the error there. Please do not include any personal data or screenshots with personal data. Please only explain the issue in text form.