First thing you should do is make sure Agris is on at least 19.3.0.3 before continuing to troubleshoot
If statements are not showing up in MyGrower at all
Are they spooled?
This needs to be visually verified in AGRIS
If you can see the statements in MyGrower but unable to open them
Check to make sure pop-up blocker is off or disabled for MyGrower
Is the Statement a Graphic form?
Visually verify, this needs to be graphic and spooled in order to work in MyGrower.