So according to
ImportLog Entity Reference (Dynamics 365 Customer Engagement) | Microsoft Docs
There exist an ErrorDescription column from the importlog entity
I can fetch all the other data in importlog just fine but I when I fetch the errordescription it"s always null
And when I use FetchXMLBuilder in Xrmtoolbox to look for all the column, the errordescription column doesn"t even show up which is weird because the other column showup just fine.