Can't load system status after upgrading from 4.7.31 to 5.2.2 on latest WP. When I try, Console shows
Uncaught Error: Syntax error, unrecognized expression: #/status and the page is blank. Error log shows
PHP Fatal error: Uncaught Error: Call to undefined function civicrmVersion() in /wp-content/uploads/civicrm/ext/com.cividesk.email.sparkpost/sparkpost.php on line 145
Tried disabling Asset Caching (in Debugging & Error Handling) to no avail. Also installed latest Sparkpost for WP, but no change. What might cause this behavior?