and here's the rest due to the message size limit here.
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: begin ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"Upgrade-Insecure-Requests\":[\"1\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/\",\"TLS\":null}"
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: Forwarding this request to URL" ForwardURL= Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"Upgrade-Insecure-Requests\":[\"1\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/\",\"TLS\":null}"
time="2021-05-04T14:46:49Z" level=debug msg="'500 Internal Server Error' caused by: unsupported protocol scheme \"\""
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"Upgrade-Insecure-Requests\":[\"1\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/\",\"TLS\":null}"
11.22.33.44 - - [04/May/2021:14:46:49 +0000] "GET / HTTP/2.0" 500 21 "-" "-" 1 "https-test@file" "-" 2ms
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: begin ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/favicon.ico\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"image/webp,*/*\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Referer\":[\"https://test.exmaple.org/\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/favicon.ico\",\"TLS\":null}"
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: Forwarding this request to URL" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/favicon.ico\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"image/webp,*/*\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Referer\":[\"https://test.exmaple.org/\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/favicon.ico\",\"TLS\":null}" ForwardURL=
time="2021-05-04T14:46:49Z" level=debug msg="'500 Internal Server Error' caused by: unsupported protocol scheme \"\""
time="2021-05-04T14:46:49Z" level=debug msg="vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/favicon.ico\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"image/webp,*/*\"],\"Accept-Encoding\":[\"gzip, deflate, br\"],\"Accept-Language\":[\"de,en-US;q=0.7,en;q=0.3\"],\"Cache-Control\":[\"no-cache\"],\"Dnt\":[\"1\"],\"Pragma\":[\"no-cache\"],\"Referer\":[\"https://test.exmaple.org/\"],\"Sec-Gpc\":[\"1\"],\"Te\":[\"trailers\"],\"User-Agent\":[\"Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"11.22.33.44\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"11.22.33.44:38784\",\"RequestURI\":\"/favicon.ico\",\"TLS\":null}"
11.22.33.44 - - [04/May/2021:14:46:49 +0000] "GET /favicon.ico HTTP/2.0" 500 21 "-" "-" 2 "https-test@file" "-" 1ms
time="2021-05-04T15:03:02Z" level=debug msg="Serving default certificate for request: \"\""
167.248.133.54 - - [04/May/2021:15:03:03 +0000] "GET / HTTP/1.1" 404 19 "-" "-" 3 "-" "-" 0ms
time="2021-05-04T15:03:04Z" level=debug msg="Serving default certificate for request: \"\""
167.248.133.54 - - [04/May/2021:15:03:04 +0000] "GET / HTTP/1.1" 404 19 "-" "-" 4 "-" "-" 0ms
time="2021-05-04T15:04:33Z" level=debug msg="vulcand/oxy/roundrobin/rr: begin ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.68.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"55.66.77.88\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"55.66.77.88:38532\",\"RequestURI\":\"/\",\"TLS\":null}"
time="2021-05-04T15:04:33Z" level=debug msg="vulcand/oxy/roundrobin/rr: Forwarding this request to URL" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.68.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"55.66.77.88\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"55.66.77.88:38532\",\"RequestURI\":\"/\",\"TLS\":null}" ForwardURL=
time="2021-05-04T15:04:33Z" level=debug msg="'500 Internal Server Error' caused by: unsupported protocol scheme \"\""
time="2021-05-04T15:04:33Z" level=debug msg="vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\",\"RawFragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.68.0\"],\"X-Forwarded-Host\":[\"test.exmaple.org\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"466a3d99e9b4\"],\"X-Real-Ip\":[\"55.66.77.88\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"test.exmaple.org\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"55.66.77.88:38532\",\"RequestURI\":\"/\",\"TLS\":null}"
55.66.77.88 - - [04/May/2021:15:04:33 +0000] "GET / HTTP/2.0" 500 21 "-" "-" 5 "https-test@file" "-" 0ms