The error message "Further Detail: Invalid_Client: captcha_required" is advising that the account needs to be authenticated again.
Please log into go.accessacloud.com under your account to complete this Captcha.
Once this is complete, the authentication will go through and you'll be able to log in as usual.
Error - 'There was a problem Authenticating user on https://document.accessacloud.com web service URL!'
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