John,
Thank you for the rollback information. I will try to upgrade again.
John,
That is exactly what I did -I updated the ACF plugin, then updated the add-ons repeater and flex, and then the database. After doing those steps in that sequence all of my Field Groups disappeared. I am using the free version of ACF. I upgraded from Version 4.4.12 to 5.7.6 and running Word Press 4.9.8. How can I roll back???
I experienced something similar. When I updated to 5.7.6 the ACF Fields Groups disappeared on the custom fields on pages and posts were no longer visible. I also updated the database.