You've chosen a bidder for your job, go to the PayPal window but PayPal rejects your payment. This can happen for a few reasons:
1) You do not have a valid credit card associated with your PayPal account, and
2) Your bank account associated with your PayPal account has not been VERIFIED by them, or
3) Your VERIFIED bank account balance is low.
In other words, PayPal can't process a payment from you unless it can insta-bill a credit card company, or take an ACH payment.
The easiest way to remedy this is to enter your credit card into the PayPal window in Crowdservice. Alternatively, you can go to your account on the PayPal website and put a Credit Card on file with them there. While you're there, if your bank account has not been verified by PayPal you can submit it for verification.
A verified account with PayPal will also earn you a higher security rating with Crowdservice, for everyone to see.
**Note, that we have not yet programmed a 'Back' button on this view, so if you get stuck here just close the app from your phone and restart to go back to Crowdservice.