XF 1.5 Images not showing after activating SSL and proxy images

[brunoa]

I switched my forum to HTTPS and turned image proxy on, but now images on posts are not showing up (though the old ones before turning the SSL on are fine) and the error log is showing the kind of error message bellow, repeatedly.

Could this be something related to server permissions? Any ideas? Thanks!

ErrorException: getimagesize(): Read error! - library/XenForo/ImageProxyStream.php:204
Gerado Por: Conta Desconhecida, 1 minuto atrás
Rastreamento de Pilha #0 [internal function]: XenForo_Application::handlePhpError(8, 'getimagesize():...', '/r7/www/forum/p...', 204, Array)
#1 /r7/www/forum/public_html/library/XenForo/ImageProxyStream.php(204): getimagesize('/r7/www/forum/p...')
#2 /r7/www/forum/public_html/library/XenForo/ImageProxyStream.php(255): XenForo_ImageProxyStream::_runImageCheck('xf-image-proxy:...')
#3 /r7/www/forum/public_html/library/XenForo/Model/ImageProxy.php(482): XenForo_ImageProxyStream::getMetaData('xf-image-proxy:...')
#4 /r7/www/forum/public_html/library/XenForo/Model/ImageProxy.php(334): XenForo_Model_ImageProxy->_fetchImageForProxy('http://www.john...')
#5 /r7/www/forum/public_html/library/XenForo/Model/ImageProxy.php(122): XenForo_Model_ImageProxy->_fetchAndCacheImage('http://www.john...', Array)
#6 /r7/www/forum/public_html/library/XenForo/Model/ImageProxy.php(26): XenForo_Model_ImageProxy->refreshImageIfRequired(Array)
#7 /r7/www/forum/public_html/library/XenForo/ProxyOutput.php(258): XenForo_Model_ImageProxy->getImage('http://www.john...')
#8 /r7/www/forum/public_html/library/XenForo/ProxyOutput.php(193): XenForo_ProxyOutput->_outputImage(false)
#9 /r7/www/forum/public_html/library/XenForo/ProxyOutput.php(426): XenForo_ProxyOutput->output()
#10 /r7/www/forum/public_html/proxy.php(12): XenForo_ProxyOutput::run()
#11 {main}
Solicitar Estado array(3) {
["url"] => string(147) "https://forum.outerspace.com.br/proxy.php?image=http%3A%2F%2Fwww.johnnypagbrasil.com%2Fimages%2Fprostreet.jpg&hash=50f86ff6be3de564e41496efe8fce315"
["_GET"] => array(2) {
["image"] => string(51) "http://www.johnnypagbrasil.com/images/prostreet.jpg"
["hash"] => string(32) "50f86ff6be3de564e41496efe8fce315"
}
["_POST"] => array(0) {
}
}