Me too, getting this error on every ACF admin page. ACF Pro V6.2.6.1. Seems to be working otherwise.
Brian
OK, as soon as I posted, I got it to work! Go to Updates -> click Check, then go to Plugins page and it should be update-able… Or something else was going on and this worked by coincidence.
Getting same error as everyone else. Can’t update ACF Pro on some sites, while others work using the exact same auth code.
An error occurred while updating Advanced Custom Fields PRO: Before you can receive product updates, you must first authenticate your Elegant Themes subscription. To do this, you need to enter both your Elegant Themes Username and your Elegant Themes API Key into the Updates Tab in your theme and plugin settings. To locate your API Key, log in to your Elegant Themes account and navigate to the Account > API Key page. Learn more here. If you still get this message, please make sure that your Username and API Key have been entered correctly
All sites are on the same server. Tried many of the techniques in this thread.
