Invoice Gateway Not Working after WOO 9.8.4 update

Hi Team,
I’ve read a few threads with similar issues saying the plugin stopped working after updating WOO etc…

i use ASTRA pro theme and since updating plugins for Woocommerce and Theme etc… Invoice Gateway has completely stopped working. I have a section in my backend (dashboard) where i enter in my own PO number and Invoice number and i cannot get it to save. It saves BLANK.

completely unresponsive.

i tried deactivating and Activating the plugin again…but computer says nooooooooo.