Yes, also having problems with Wells Fargo starting in June 2017. I am using GnuCash v2.6.14 on Mac (Intel). I was getting Generic Error 2000 no matter what settings I used in aqbanking setup. I tried deleting and recreating the account but that also failed.
I called Wells Fargo and they said Quicken 2014 is no longer supported and it was officially tuned off in June. You have to use Quicken 2015, 2016, or 2017.
So, The OnLine Banking Settings for GnuCash for Wells Fargo have changed as follows:
User Settings tab - you must have a Client UID so if this field was blank before you now need a value
Bank Settings tab - no changes required
Bank Name=Wells Fargo Bank
Broker Id=<leave it blank>
User Settings tab - must change Application Version and Header version
Application Version=2600 (Represents Quicken 2017) (previous setting was 2300 which Represents Quicken 2014)
Header Version=103 (previous settings was 102)
Special Settings are all blank (or not changed from default)
In case anyone else has suddenly started having issues with Wells Fargo about mid-June 2017, here is what I did:
Changed appver from 2400 to 2600 (though this by itself did not do the trick), then I added:
ofxver : 103
These changes I made to PocketSense scripts....Sites.dat file to all entries for banking, credit, and brokerage entries for Wells Fargo.
Good luck out there. Long live Microsoft Money!