Best piece of advise I can give is be patient. It can take time for the processing…. Like up to 15 minutes…
Just continue trying to place the ad and once it’s fully processed you’ll be directed to the prompts for entering the ad info versus PayPal info…
Back away from the ‘puter for 15 minutes and come back and try again. I’ve run into the same issue and learned to have a cold refreshment after completing the PayPal portin and then it’s all good….
If you still have issues email the site mod’s and they’ll help out.
IMHO I’d like to see the ad process refined to align with the other great processes of this site. But that’s just me….