Hmm. That's suspicious. I've never seen that error. Are you signing into your OBiTALK user portal via a Google ID, or are you using a dedicated OBiTALK user name and password? If the former, I wonder if that is what is causing the conflict. Are you using a Gmail account to do this, or is this a Google Apps domain account or another email account, like Yahoo Mail? You should only be using a Gmail account.
If you
are using a Gmail account, then read below for further steps.
I know you said you tried starting over already. But, this sounds like there is still something that didn't get reset. I would next try to log into the OBiTALK portal, and completely delete your OBi device off of the account. Then, wait for the OBiTALK system to send the reset command to the device, and you will see it do some LED flashing. After that stabilizes, then unplug the OBi from power, hold down the recessed hardware reset button on the underside of the box with a paper clip, plug in the power, wait for 10 seconds, release the button, and let the box reset itself. After that's done, then...
On your web browser, log into Gmail (not GV). Look at the lower right corner of the page, below the last email note displayed in the list, for the small link "Details". Click it. A window should pop up, with a push-button offering to sign out all other sessions. Click that button. Then, log out of Gmail. Clear your browser's cache, history and cookies. Close and reopen the browser.
Sign into the correct Google Voice account. Look up at the upper right corner of the page for your avatar. It will either be a blue generic head and shoulders, or an image you uploaded. Hover your mouse cursor on it, and look at the user ID that it reveals (like
joe@gmail.com). Is that the correct account that you wish to use? If not, log out and log back in with the correct account.
Go to this page, and change your password:
https://myaccount.google.com/?pli=1 and
write it down!Also, take this opportunity to set up a backup email account and backup phone number, in case you forget your password.
Now, go back to my instructions that drgeoff linked earlier, and start all over. Tell us exactly what happens, if anything happens that is not as described in the instructions.