I'm not sure where to report bugs in the Beta connectors, so I'll leave this here.
I'm successfully loading from a SharePoint List on O365 using the Nov17 release of QWC, however at first glance it does not appear to pull all columns. Upon closer inspection, it seems that maybe it is pulling all of them, it just renames some and puts others under the wrong column header.
In my case, a field values for a column called Account Name were put under another header, PCC. The PCC values, were under the header "title" which doesn't exist in this SP List.