Right before the upgrade starts about the 4th step in the screen turns white and cannot go any further. This same issue happened in the upgrade from 7.10 RC1 to RC2. I tried the extract the content of “include\SugarEmailAddress” from the zip and copy it manually to your SuiteCRM installation, https://suitecrm.com/suitecrm/forum/suitecrm-beta/17711-7-10-rc2-upgrade-failed#59760 that did no thelp.
Anyone facing the same issue ?