Invalid Value Passed for Phone

Invalid Value Passed for Phone

Each time we try to signup for Books w/our acct, we receive the following error: "Invalid Value Passed for Phone" 
Thanks in advice for your help, Craig 
We have a phone # input into our acct info, so not sure why this is happening? 
Additionally, when trying to complete a help request within Books, it always errs out w/"Invaid Captcha"