Hi,
in Hikashop and with Firefox, JCE displays nothing in "Editor" tab.
No problem with Chrome or Safari. No problem either with articles and modules.
I've just noticed that if I deactivate SEOInfo from browser extensions, the issue goes away.
I've tried excluding the back-end URL in extension settings, like this, but the problem persists.
http{*}://{*}administrator/index.php?option=com_hikashop{*}
Are you experiencing the same problem?
Thanks,
Lorenzo