I want to know the possible reasons of this issue without going to excel sheet.
what usually is done in the survey builder that went wrong. Any possible instructions of what we should not do to avoid this msg.
Also I have done an online validation through ODK and I get the following main two errors
In Matrix question y
[row : 125] Group has no label: {‘name’: ‘y_z_1_1’, ‘type’: ‘begin_group’}
and
Matrix question x
[row : 211] Group has no label: {‘name’: ‘x_81_1’, ‘type’: ‘begin_group’}
what I shall do ? I do not know how to set up or edit xml/xls files. How I can fix through builder?