Hi Ryan,
thats me again 😃
Actually I get the error Invalid URL in the popup, when I open the mediabox for the introimage or articleimage. I don't know why, but the following change solves my problem.
/administrator/components/com_jce/helpers/browser.php in line 32
from
$url = 'index.php?option=com_jce&task=plugin.display&plugin=browser&standalone=1&' . $token . '=1&client=' . $app->getClientId();
to
$url = JUri::base(true) . '/index.php?option=com_jce&task=plugin.display&plugin=browser&standalone=1&' . $token . '=1&client=' . $app->getClientId();
Have you an idea why?
My Problem, I can't reproduce it on different installations. Sometime it works, sometime not but with my change, always.