The “X” date of the “Y” agenda is not correctly defined
By creating an “Y” section of the agenda type, you’ve added the “X” date but you haven’t define it correctly. Which means it doesn’t have a destination. On the example you can see we have two dates but the first doesn’t have a destination defined.
You must sign it a destination. This will be the section from which the user will access from that date.
For that, access the “Y” section of the agenda type and pick the destination of the “X” date.