If you are using SP Page Builder version FREE or PAID, when you want to make update to Joomla 3.8 , after update, you will have white blank page in admin section.
How to fix?
go to modules/mod_sppagebuilder and rename this folder like _mod_sppagebuilder
go to administrator/modules/mod_sppagebuilder_admin_menu and rename folder to _mod_sppagebuilder_admin_menu
Now admin backend will work
Install-Reinstall SP Pag builder latest version com_sppagebuilder_pro_v2.5.3 in our case.
Or fast and simple solution: Download this file, and gp to administrator/modules/mod_sppagebuilder_admin_menu , here delete all files from folder mod_sppagebuilder_admin_menu and add new files.
DOWNLOAD HERE
Now upload all from downloaded file to this folder
See video here: https://www.youtube.com/watch?v=CCdPH75ynxA
Clean cache and try
