If you look at the code here:
https://github.com/evernote/evernote-sdk-ios/blob/master/evernote-sdk-ios/internal/ENOAuthViewController.m
that implement OAuth
from wiki
102 Processing (WebDAV; RFC 2518) As a WebDAV request may contain many sub-requests involving file operations, it may take a long time to complete the request. This code indicates that the server has received and is processing the request, but no response is available yet.[3] This prevents the client from timing out and assuming the request was lost.
from
WebKitErrorDomain A string used by NSError to indicate that the error was originated by a WebKit class.
looks loke web kit errors are something internal and author do not want to handle this error
do not see that there's && in condition. So that mean that if WebKitErrorDomain appears and code is 102 -- that means that web kit can not show page for now, because there're too many sub-requests and you have to wait a bit