Since a recent upgrade to APEX 18.1.0.00.45 (previous version was 4.1.2), I'm getting this error when trying to submit a page using a button with action 'Submit Page'
The error just returns a pop up (in Chrome, IE, Firefox, ...) saying 'Please wait until the page is fully loaded and try again.'
The page contains an iframe displaying a map generated by the Google maps API, a couple of buttons and a text area item. This problem didn't happen in the past with the old version of APEX.
I looked around a bit on Google and some sources said that there is incomplete or incorrect Javascript causing this error, but I've checked the console for any possible JS errors, and there are none.
I don't understand what suddenly changed with the recent upgrade that causes such an error. Any help or tips would be greatly appreciated!