The Upgrade wizard hangs at 1% when uploading the new 7.10.x to 7.10.10 zip file.
In the error log I see:
[Sun Nov 11 11:38:44.316083 2018] [:error] [pid 31098:tid 139663670949632] [client xx.xx.xx.xx:55761] SoftException in Application.cpp:267: File “/home/yyyy/public_html/themes/SuiteP/css/colourSelector.php” is writeable by group
I also see:
PHP Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; nusoap_parser has a deprecated constructor in /home/yyyy/public_html/include/nusoap/nusoap.php on line 8205
The int was the failure at 1%. Of course the php.ini was set too low for file uploads. Since the upgrade zip file was approaching 2.5 MB, set max upload and Post Max size to 5MB.