ERROR: Challenge is invalid!

Dear team,
Just ran into another issue with renewing my domain
Can you tell me what is wrong here? Thanks.

Processing with alternative names:

  • Checking domain name(s) of existing cert… unchanged.
  • Checking expire date of existing cert…
  • Valid till Apr 26 11:37:35 2018 GMT (Less than 30 days). Renewing!
  • Signing domains…
  • Generating private key…
  • Generating signing request…
  • Requesting authorization for
  • Requesting authorization for
  • 2 pending challenge(s)
  • Deploying challenge tokens…
  • Responding to challenge for authorization…
    ERROR: Challenge is invalid! (returned: invalid) (result: {
    “type”: “http-01”,
    “status”: “invalid”,
    “error”: {
    “type”: “urn:acme:error:connection”,
    “detail”: “Fetching https:/ Error getting validation data”,
    “status”: 400
    “uri”: “”,
    “token”: “YuQMG0CkWdeXEk4FkuODRHLNAG-0OctT3SalA97JLQk”,
    “keyAuthorization”: “YuQMG0CkWdeXEk4FkuODRHLNAG-0OctT3SalA97JLQk.VDqQwSUkpBfZRW4VkTQONFmmQCEF81bEBxi1eadN310”,
    “validationRecord”: [
    “url”: “https:///”,
    “hostname”: “”,
    “port”: “443”
    “url”: “”,
    “hostname”: “”,
    “port”: “80”,
    “addressesResolved”: [
    “addressUsed”: “”
    Deploying Let’s Encrypt certificates:
    Skipped, deploy script not set or not executable.

The site is redirecting to https:/, which is missing a / between the scheme and hostname.

Check the Apache configuration for something like "Redirect / https:/" and add another "/" so it's "Redirect /"

Stupid typo - thanks for this.

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