Unable to complete a PO

[TheDeFiler]

There's this PO I am unable to start even though I accepted it. Here are the images below:





I tried switching classes and no dice. Any other suggestions?

Thanks

[Sizustar]

Choose the right class with the right weapon.

[GeoSword]

Change to Buster Class, then equip a Pile weapon. That mission requires you to capture a Gigantes, this being Agrious.

[TheDeFiler]

Damn. I chose the right class but didn't realize the check the weapon. Thanks everyone!