I upgraded to Joomla 3.7.3 and PHP 5.6.29. Since those upgrades, we can no longer create new K2 articles or edit existing ones. On existing content all fields (category, tags, etc.) are correctly populated. The content tab is blank except for an icon that I associate with "power" on/off. If I switch to another editor then the content box is populated. I tried uninstalling JCE and reinstalling but it still doesn't display text in content box. I also purged cache with no effect.
If I inspect the "power" icon in the content field, it references:
<div class="k2ItemFormEditor">
<div class="editor wf-editor-container">
<div class="wf-editor-header"><a href="#" class="wf-editor-toggle"></a></div>
Is that an issue with my template? The text is in the div but it's attribute is set to hidden.
Any suggestions/fixes?