As a long time Google Chrome user I know that problems arise with forms when I do not clear my cache of built-up browsing data and cookies. In Chrome: select settings; scroll down to bottom of page select Advanced; Under Privacy and Security select Clear Browsing Data; Select browsing history for last 4 weeks and check the 1st 4 boxes which represents the junk your browser collects. Select Clear Browsing Data. X out of settings....your done.
Reopen the app or form your attempting to complete.