# Go Application Not Loading, Possible certificate error **URL:** \ **Category:** General\ **Tags:** login-only\ **Created:** [October 27, 2024, 8:25pm UTC](https://community.fly.io/t/go-application-not-loading-possible-certificate-error/22470 "2024-10-27T20:25:51Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![prdsrm](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/prdsrm/32/15495_2.png) [@prdsrm](https://community.fly.io/u/prdsrm)\ **Post date:** [October 27, 2024, 8:25pm UTC](https://community.fly.io/t/go-application-not-loading-possible-certificate-error/22470/1 "2024-10-27T20:25:51Z")
Hi! I’m trying to deploy an internal application that I host on GitHub. I use GitHub actions for CI, I was looking to implement something simple like [https://fly.io](https://fly.io) for CD. I’m following 1-1 the [GitHub - fly-apps/go-example: A minimal Go application for tutorials](https://github.com/fly-apps/go-example). My app isn’t even slightly different from the go-example, which worked when I tested. My `fly.toml` file is the one generated by `flyctl launch`, same for `Dockerfile`. I did not changed anything. Its just an API, with some generated code from OpenAPI specification, that listens on the same port as the example, :8080. But instead of working when I go to the url, the following just loops over: ```auto 2024-10-27 20:42:44.772 INFO [fly api proxy] listening at /.fly/api 2024-10-27 20:42:44.771 INFO Preparing to run: `/` as root 2024-10-27 20:42:44.630 INFO Starting init (commit: 693c179a)... 2024-10-27 20:42:44.404 [0.280114] PCI: Fatal: No config space access function found 2024-10-27 20:42:44.038 2024-10-27T19:42:44.038483089 [01JB7R01BSN2108N39FM67VH01:main] Running Firecracker v1.7.0 2024-10-27 20:42:42.762 [1.673933] reboot: Restarting system 2024-10-27 20:42:42.760 WARN could not unmount /rootfs: EINVAL: Invalid argument 2024-10-27 20:42:42.759 INFO Starting clean up. 2024-10-27 20:42:42.743 INFO Main child exited normally with code: 1 2024-10-27 20:42:41.904 2024/10/27 19:42:41 INFO SSH listening listen_address=[fdaa:a:da35:a7b:f3:3f5e:81b3:2]:22 dns_server=[fdaa::3]:53 2024-10-27 20:42:41.877 Machine started in 960ms 2024-10-27 20:42:41.805 2024/10/27 19:42:41 ws connection error: new ws client: dial: tls: failed to verify certificate: x509: certificate signed by unknown authority 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Initializing client 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Getting rpcURL and wsURL, dev mode is: false 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Starting server, listening on port 8080, production mode ``` And, when I go to .fly.dev, 502 error is shown. I can try anything, it just won’t load. While, it should send back a JSON message with the version. Its a really simple endpoint, as simple as the one from the example, I just added it to my API in order to test [fly.io](http://fly.io) service. It is fully working locally. It literally just shows: `{"version": "1.0.0"}` I can know that my app is started when I try to reach the endpoint because of the logs that are shown: ```auto 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Initializing client 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Getting rpcURL and wsURL, dev mode is: false 2024-10-27 20:42:41.774 2024/10/27 19:42:41 Starting server, listening on port 8080, production mode ``` I’ve been struggling since 2 hours, verified everything, but nothing seems to work. I feel like the error is related to certificates, since `2024/10/27 19:42:41 ws connection error: new ws client: dial: tls: failed to verify certificate: x509: certificate signed by unknown authority` is the only log tagged as error. I do not use my personal domain though… I just use the one provided by [fly.io](http://fly.io), `.fly.dev`… So it should work, just like it did in the example… Also, RootFS is always in pending sync, I don’t know what it means… `RootFS Sizes * [Pending Sync]` ---
**Author:** ![system](https://global.discourse-cdn.com/fly1/original/3X/6/e/6e8955d00cb218e186ebbe3a6ab06fefdce15290.svg) [@system](https://community.fly.io/u/system)\ **Post date:** [November 3, 2024, 8:26pm UTC](https://community.fly.io/t/go-application-not-loading-possible-certificate-error/22470/2 "2024-11-03T20:26:22Z")
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