# Getting error in launcher rebuild app
**URL:** https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600
**Category:** Self-hosting
**Created:** [March 18, 2023, 4:55pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600 "2023-03-18T16:55:15Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@apleschu](https://meta.discourse.org/u/apleschu)
#### Post date: [March 18, 2023, 4:55pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/1 "2023-03-18T16:55:15Z")
today I am getting errors in trying to rebuild the app and nothing I try has any effect. In particular the error I am getting is:
```plaintext
I, [2023-03-18T16:41:52.325609 #1] INFO -- : > cd /var/www/discourse && gem install bundler --conservative -v $(awk '/BUNDLED WITH/ { getline; gsub(/ /,""); print $0 }' Gemfile.lock)
ERROR: Could not find a valid gem 'bundler' (= 2.4.4), here is why:
Unable to download data from https://rubygems.org/ - Errno::EADDRNOTAVAIL: Failed to open TCP connection to rubygems.org:443 (Cannot assign requested address - connect(2) for "rubygems.org" port 443) (https://rubygems.org/specs.4.8.gz)
```
There was a short blip earlier where rubygems really had a problem, but as far as I can tell thats no longer the case. I can download everything here, just when trying to run through the launcher it does not work.
Any hints for a ruby dummy?
---
### Author:  [@Ed\_S](https://meta.discourse.org/u/Ed_S)
#### Post date: [March 18, 2023, 5:04pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/2 "2023-03-18T17:04:50Z")
Did you see this earlier similar-looking problem, where the solution was related to ipv6?
[Build Fails on New Host](https://meta.discourse.org/t/build-fails-on-new-host/220755)
---
### Author:  [@apleschu](https://meta.discourse.org/u/apleschu)
#### Post date: [March 18, 2023, 5:14pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/3 "2023-03-18T17:14:16Z")
Thanks, yes I did see that, and while I do have IPv6 enabled on that host it is enabled since the forum was born.
I specifically looked and in docker there is no IPv6 enabled, and [rubygems.org](http://rubygems.org) resolv just fine to an ipv4 address.
---
### Author:  [@Ed\_S](https://meta.discourse.org/u/Ed_S)
#### Post date: [March 18, 2023, 5:34pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/4 "2023-03-18T17:34:09Z")
Maybe try
```plaintext
wget -O /dev/null https://rubygems.org
```
and see what happens. I’m not absolutely sure if this should be tried on the host or inside the container - for me, in both cases it works OK.
---
### Author:  [@apleschu](https://meta.discourse.org/u/apleschu)
#### Post date: [March 18, 2023, 5:47pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/5 "2023-03-18T17:47:04Z")
Thanks Ed, that gets us closer to the root cause.
[rubygems.org](http://rubygems.org) - works on host, inside the container:
`Connecting to rubygems.org (rubygems.org)|151.101.1.227|:443... failed: No route to host.`
But
```plaintext
wget -O /dev/null https://google.com
```
Works just as it should. Mayhaps rubygems still has a problem. I guess I am going to try on Monday again.
Since google works, I think I can assume the setup is correct, meaning the problem seems to be outside of my control.
Thanks again for the troubleshooting help.
---
### Author:  [@Ed\_S](https://meta.discourse.org/u/Ed_S)
#### Post date: [March 23, 2023, 1:40pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/6 "2023-03-23T13:40:36Z")
Did you find any solution to this problem? (Rebuild unable to reach rubygems website)
---
### Author:  [@apleschu](https://meta.discourse.org/u/apleschu)
#### Post date: [March 23, 2023, 2:08pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/7 "2023-03-23T14:08:05Z")
Yes, I did find a solution. it seems as if rubygem did have a problem at the time. I started the rebuild again the next morning and it went through just as it was supposed to.
Since I did not change anything and my internet connection was up and running (being my own ISP does have advantages) my only guess is that rubygems did in fact really have a problem.
Thanks again for the help
---
### Author:  [@system](https://meta.discourse.org/u/system)
#### Post date: [April 22, 2023, 2:08pm UTC](https://meta.discourse.org/t/getting-error-in-launcher-rebuild-app/258600/8 "2023-04-22T14:08:28Z")
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