Append fields can become quite large and contain too much text to display in a report easily. You can use a formula text field to display only the most recent value from your append field and then display the formula text field in your reports instead of the append field.
This Alert indicates that a table in your application has almost reached its storage limit size. In order to keep the "quick" in QuickBase, tables have a maximum size limit. When this limit is reached, users are prevented from adding new records.
To see how close you are, you can check your application's
Use a field of type "Formula - URL (Link)". Set the cover text to "Click Here.." and then use a formula to point to a report that selects for only one record based on the Record ID# field which is unique for every record.
The URL for a report using the API is for example: