Letsencrypt Certificate - Failing ACME Challenge with 403 error

Pritunl Pritunl Zero
1

I am getting this error while trying to generate the LetsEncrypt Certificate for pritunl. The ports, etc are all accessible - yet the cert is not being issued. Any help would be appreciated

acme: Authorization wait failed
acme: authorization error: 403 urn:ietf:params:acme:error:unauthorized: 13.204.120.189: Invalid response from https://pritunl-globicon.cnbtek.com/.well-known/acme-challenge/0Blylm_kiR21LrzoH1C3hNLTb14ay4y1mhh9rnQiseE: "<!DOCTYPE html>\r\n<html lang=\"en\">\r\n  <head>\r\n    <meta charset=\"UTF-8\" />\r\n    <link\r\n      rel=\"icon\"\r\n      type=\"image/svg+xm"
ORIGINAL STACK TRACE:
github.com/pritunl/pritunl-zero/acme.Generate
	/go/src/github.com/pritunl/pritunl-zero/acme/acme.go:324 +0x11e9725
github.com/pritunl/pritunl-zero/acme.Renew
	/go/src/github.com/pritunl/pritunl-zero/acme/acme.go:443 +0x11ea55a
github.com/pritunl/pritunl-zero/acme.RenewBackground.func1
	/go/src/github.com/pritunl/pritunl-zero/acme/acme.go:457 +0x11ea68f
runtime.goexit
	/usr/local/go/src/runtime/asm_amd64.s:1700 +0x47e780
2

That’s likely a load balancer issue or the DNS record changed and is still cached. Port of the VPN server must be open for the Lets Encrypt servers to query the certificate challenge token.