@xXPikaCuddlesXx What patch are you referring to? Origin should alert you any time a new patch is available for the game (or it may update it automatically, depending on your settings). The current patch is patch 11 (which shows up as version 12 in package.mft, only relevant if you use mods). This thread is very old, so the patch issues they're talking about are quite out of date.
*Ignore if you have not modded your game*
If you're using mods and you're having the white screen issue, the easiest way to get past it is to remove your merged mod folder (just move it if you don't want to change anything/do a re-merge afterwards), then change your version number in the package.mft file located at [X]:\Program Files\Origin Games\Dragon Age Inquisition\Update\Patch (where [X] is the drive you have the game installed to) by adding one to whatever it is (hopefully it's 12, so you should just have to change it to 13). This is so you can load your save. Remember to change your package.mft back before you re-merge mods or put your mod folder back in the Update folder.
If you're looking for the most recent version of mod manager, you can find it here.
I just want to add on to the post above me, that I found part of my issue was in a mod to replace the texture for my Dalish Female Elf's "Skyhold Pajamas" outfit. I haven't gotten to the "Discover Skyhold" sene with any of my other inquisitors, but I believe that's what was my issue - not using the default pajama outfit. So far it seems to be holding true.
