Since yesterday I am having the issue that I cannot use composer install or composer update anymore, nor can I install a new version of Laravel. This all happened "suddenly", no changes were made on my part, not anywhere.

When changing nothing, network-wise, I get this error, the 60:

But when using a VPN or using my mobile phone as hotspot as a workaround, I get the 28 error:

I have also tried on my work computer, on my own home network, and it works fine there.

I have tried every solution from similar questions, too many to put down here. I have also re-installed Windows 10 and later Windows 11, and thus also re-installed Vagrant, VirtualBox, Homestead, and so on.

Tried disabling ipv6 entirely, tried using a different DNS, but the issue remains the same each time.

Also I have tried using Xammp instead of Homesteam, and also my regular cmd prompt instead of Git Bash. All to no avail.

At this point I am not sure what to do anymore. I thought about resetting my modem and router back to factory settings but if even the same issues occur using my mobile 4G connection, this will not solve anything.

If anyone has any ideas as to what might cause this, it would be very helpful.

PS. A few of the solutions I have tried:

• 

  The certificate:

  

  This issue does not appear when using a VPN. Trying to figure out what is exactly wrong and how to solve it now, but just editing it here in case someone knows what is wrong / has a fix.

  When trying to pull in my repo, I sometimes get this "error" as well:

  

  Also have installed Windows 11 from scratch, same issue. Lastly I tried this fix, but same issue:

  

  Edit: Also just tried on my girlfriend's computer and got the same errors. Only installed Xammp there and composer and tried to install laravel, nothing more.

  Latest edit: I tried installing Ubuntu on a virtual machine and install laravel using composer. Same issue, with the certificate:

  

  I tried browsing to https://codeload.github.com and got the same error. But here I had the option to accept the risk and continue. But then I got a warning from my hosting provider (I live in Barcelona so it's in Spanish):

  

  Translation:

  

  So it could be all of this is being blocked by some firewall from my hosting provider. But then that would not explain 3 things:

  1. I get the same issues when using my phone's 4G (but same provider so could make sense)
  2. I can browse to https://codeload.github.com on my desktop now and it works (in a private window of Firefox same issue though)
  3. On my work laptop I have no issues using composer or browsing to the codeload page.

  CodePudding user response：

  So it seems this Vodafone "Secure Net" was the issue. I disabled it in My Vodafone and immediately I could install a fresh copy of Laravel. I figured it out in the end by installing Ubuntu on my virtual box because there I had the option to take the risk and continue to figure out it was the Secure Net blocking the access.

  Now, after testing a bit more, and troubleshooting for 3 days, everything is working again like a charm!