Troubleshooting

Choose the problem you are having and work through the checks in order.

Sign in with the invited email address. If you are already using another account, sign out through the user menu and sign in with the right one.
Open the latest invitation link from the email. Answered, revoked, or expired invitations are no longer valid; invitations last seven days.
If signing in itself fails, retry the method you previously used (Sign in with Google or Sign in with Microsoft).
Ask an organization owner or admin to check the email address and resend under Members → Open invitations or send a new invitation.

My import fails

Make sure the file is saved as .xlsx.
Check the first worksheet and remove the header row. Read the specific reason under Import failed.
Check column A for unique short codes (Alias) using A–Z, a–z, 0–9, and -, and column B for names. Rows with both fields empty are skipped; if only one is missing, the file is rejected.
If an alias already belongs to a teacher or room of the other type, use another alias. Check both resource lists.
Test a copy with only one complete data row.

Open Lessons and check Total.
Count the placed occurrences. When the full total is placed, the lesson disappears from the pool.
Check that you opened the correct timetable and project.
Increase the total only if another occurrence is genuinely required.

On narrow screens, grid cards do not show teacher or room aliases. The assignment may still be there.

Under Lessons, open the affected row and check the resource assignment. Scroll the table horizontally if needed to see the room column.
Select the specific placement and check whether the resource was removed only there.
In the placement dialog, check whether the resource is hidden.
To check the PDF, use Advanced export → Show hidden teachers/rooms.

Open Conflicts and check every class listed in the affected card.
Make sure the affected resource is no longer assigned to two placements at the same time. Hiding a resource does not remove its assignment and therefore does not resolve the conflict.
Reopen Conflicts after the correction. If a save error appears, follow the automatic saving guidance.
Remember: Approve moves the overlap to approved conflicts but does not resolve it.

Do not reload to check saving: reloading or closing the page can interrupt a save in progress. A card appearing immediately does not confirm that the change has been saved.
For Failed to save, the affected change is undone. Check the source cell, destination cell, and pool.
Check your connection and repeat only the missing move. If the card is already in the right place, do not place another occurrence.
If the error recurs, record the exact message and report the problem instead of moving more cards.

Wait until Export downloaded or The export could not be created appears.
Allow downloads for Stundenwerk and check the download folder.
Select the rows again and restart the export.
Test one timetable first to narrow the problem to multiple selection or ZIP creation.

Open All projects and check the organization name at the top. Use that name to switch to another available organization.
Projects stay with their organization; after Leave organization, you no longer have access to them.
Ask your school’s Stundenwerk administrator to invite you to the correct organization again.

Do not move any more cards yet.
In Project settings → Lesson slots, check whether the last row was removed or labels were changed.
Manually restore the previous row count, label order, and labels, then select Save. Cards keep their row numbers, not their original times; a shorter list hides placements without deleting them.
Restoring the rows makes the cards in them visible again. Check every affected class timetable and its conflicts.