Hi @ susene ,
We have updated wordpress version 4.7 on our live demo site and didn't found any issues yet .
check :
http://prntscr.com/dgs53r .
Hope you have also taken backup of your site .Can you please share your child theme in zipped package and your server php error log to check this .(upload it somewhere online and share its link here .)
Hi @karolla86,
Well as you can see screenshot above we didn't faced any issue like that .Also there is no code to reset the installation in wplms theme or any of its plugins .
So please contact your webhost to look into this .Please also share your php error log for this .(upload it somewhere online and share its link here .)