An message exists in the log similar to this:
Intuit enforced this password requirement as the fall of 2016 effectively changing how user security information is implemented for all QuickBooks users.
Further reading can be found here:
QuickBooks Pro and Premier can throw a "false positive" error, whereby you are sure you have created the proper password for the specific QQube user you created, but the QQube Log shows the same SDK error.
To fix this error you need to do two things:
is requesting access to a wiki that you have locked: https://clearify.com/wiki/view/2693/error-80040440-not-protected-w-complex-password