I suspect something's missing in your php environment like allow_url_fopen.
You may use the phpinfo section of the System Info component or manually run phpinfo(); to find out.

I'll have a look at doing that later on the demo site.

private function downloadFile($localPath, $url) {
            $content = file_get_contents($url);
            if ($content === FALSE) {
                throw new InvalidArgumentException("Cannot download file at " . $url);
            }
            $ret = file_put_contents($localPath, $content);
            if ($ret === FALSE) {
                throw new InvalidArgumentException("Cannot store content of " . $url . " to " . $localPath);
            }
        }

That's the api's code. And to my understanding file_get_contents already failed - not the storing part.
No idea why - for me it's working with 2 different sites. Try to add some error_logs inside ...

Here's the error.

I checked permissions on ossn_data and they are all 777 currently. There is a Favicon folder under tmp, but it is empty. Perhaps its a permission issue instead?

Here is the path provided in the error to confirm the link works:
zip file

Said it couldn't download the file

Please provide the exact error message, Kevin.

Hi ~Z~

Just tried to use this on the WebChat demo site and it failed during the download procedure. Said it couldn't download the file - but the source it provided worked fine. I downloaded the Zip manually, stuck it in tmp/Favicons and realised your code is looking for faviconpackage.zip, but the one provided by the Favicons generator was called faviconpackage_v0.16.zip. I renamed it, re-ran the creation and this time it found and processed the zip file.

Maybe they've changed the filename they provide?

I have now installed the Favicons Generator, the ServiceWorker AND the SiteInstaller - and all seem to work great! Thank you for doing these. I'll add a cache to the ServiceWorker so the site can work offline - then try to figure out notifications :)

No idea.
I've just (11:15 am German local time) tried "Generate" and had no issues.

Some reasons I can think of:
1. the RealFaviconsGenerator service may be overloaded at times by too many simultaneous requests, so try again at different times
2. your server may be blacklisted for some reason
3. you're running additional software (like mod_security) which may block requests like that

I tried to use this but I am getting back an error when I click the create button I get the following "error: session timeout or network problem." I have tried several devices and different networks the last two weeks and get the same message. Any thoughts?

Unfortunately, I have no access to Apple devices in order to track down what's going wrong. Perhaps you can have a look into the favicons subdirectory and find out what's missing:
- Are the generated icon wrongs?
- Or are the icons ok, but some linking code is missing?

Thanks Z-man! Any chance that we can get this updated so that Safari can have the full color fav icons since those are supported now? I tried overriding it, but nothing seemed to get the icon to change in safari.