This just happened to me over 4th of July. Seems to only affect FBA listings. This is just for the new updated ‘experience’ interface. If i use the previous version of this page, it will work again (the previous version will be discontinued on July 31st).
I can’t figure out how to reenable changing the prices on this page. I use it all the time to change several listings at a time. The only ways i can change the price now is to manually Edit the listing or uploading a flat file.
