Several widgets either never load or give the white screen of death when other plugins are active

Hero image, contact form, price table…I know there’s others but for certain these ones never load anything when I click to edit them. It’s annoying but I can live with that.

So I find another contact form plugin. I’ve tested 5 so far and all of them give the same white screen of death when I go to ‘pages’ in wordpress while siteorigin widgets bundle (SWB) is active (works fine without SWB). These are very popular plugins I’m trying. They should be working. I disabled the specific widgets in SWB that I wasn’t using and that allowed me to work on the new contact form plugin. However, all of the SWB now load forever when I click edit on them!!! I’ve deleted and reinstalled SWB. I tried the github version.

I really like the page builder and the SWB when they work but I’m reaching my patience limit.
Please help!

wordpress 4.3.1
theme sydney