After updating a Joomla site to 3.7.4, K2 started throwing the following errors:
Notice: Use of undefined constant K2_JVERSION - assumed 'K2_JVERSION' in /home/public_html/_staging/modules/mod_k2_content/mod_k2_content.php on line 13
Notice: Use of undefined constant K2_JVERSION - assumed 'K2_JVERSION' in /home/public_html/_staging/modules/mod_k2_content/mod_k2_content.php on line 33
Notice: Use of undefined constant K2_JVERSION - assumed 'K2_JVERSION' in /home/public_html/_staging/modules/mod_k2_content/helper.php on line 35
Notice: Use of undefined constant K2_JVERSION - assumed 'K2_JVERSION' in /home/public_html/_staging/modules/mod_k2_content/helper.php on line 125
Fatal error: Class 'K2Model' not found in /home/public_html/_staging/modules/mod_k2_content/helper.php on line 145
If I disable the K2 Content module, these errors go away, but then obviously K2 won't be working on the site.
Any advice or direction is greatly appreciated.