| Title is required | The evaluation or question has no title. | Add a title. |
| Max 255 characters | The title is too long. | Shorten it. |
| End date must be after or equal to start date | Ends At is before Starts At. | Fix the dates. |
| Cannot edit an evaluation that has submitted answers | You saved question changes after someone answered. | Click Discard, then clone the evaluation to change the questions. |
| Cannot delete an evaluation that has submitted answers | The evaluation has responses. | Switch off Enabled instead. |
| Maximum score must be at least 1 | A Score question's Maximum Score Value is empty or 0. | Enter 1 or more. |
| Option label is required | An option is empty. | Type a label or delete the option. |
| At least two options are required | A Single Select or Multi Select question has fewer than two options. | Add another option. |
| At least one option is required | A Checkbox question has no options. | Add an option. |
| Option titles must be unique / Option titles must be distinct within the same question. | Two options have the same name. | Rename one. |
| The attendee must be a speaker in the selected activity. | The linked speaker isn't a speaker in the linked session. | Pick a speaker of that session, or add them to the session in the Agenda. |
| Failed to clone evaluation / Failed to delete evaluation | Something went wrong on the server. | Try again. |
| Failed to generate the PDF report | The PDF couldn't be built in your browser. | Try again, or use Export report. |
| Module Access Restricted | The event's grace period has expired. | Settle payments under Go to Billing. |