Let's Encrypt issue

I can not renew the certificate. The url called by Let’s Encrypt ends with:
if I remove it “:”, I can read the url requested from my browser, but not when it’s end with “:”
I destroyed the domain and recreated without success. Can be by revoking the certificate, I do not know how to do. This in order to remove this to regenerate it after
I get this for 2 domains
challenge did not pass: Fetching //xxxx.com/.well-known/acme-challenge/uZvOWAyt6N08tkQX9xOFtvCldnlxZhK_dbNPgv28jFM: