Error loading GitHub branches [solved]

[Joss]

Just clicked on upgrades on a couple of sites and got:

Error loading GitHub branches - https://api.github.com/repos/processwire/processwire/branches - HTTP error(s): - Check that HTTP requests are not blocked by your server.

No other errors.

Any thoughts? Not having this problem on a local box and my hosting provider does not know of anything their end.

[BitPoet]

Empty user_agent option in php.ini? Github sometimes (documentation says always, but experience tells it varies) blocks requests with empty or missing User-Agent header.

[Joss]

No idea. I will go look.

[Joss]

Okay - solved. Turns out the two sites in question were still on php 5,3. Switching to 5.6 solved the problem.