Paperbuzz plugin related error in log

I installed the Paperbuzz plugin 1_0_2-0 on our OJS 3.2.1.2 by un-taring it into htdocs\journal\plugins\generic\paperbuzz. It seems to work, but php_error_log shows this error repeatedly.

PHP Fatal error: Uncaught Error: Call to undefined method Submission::getIssueId() in C:\xampp\htdocs\journal\plugins\generic\paperbuzz\PaperbuzzPlugin.inc.php:326
Stack trace:
#0 C:\xampp\htdocs\journal\plugins\generic\paperbuzz\PaperbuzzPlugin.inc.php(288): PaperbuzzPlugin->_getDownloadStats(true)
#1 C:\xampp\htdocs\journal\lib\pkp\classes\cache\GenericCache.inc.php(63): PaperbuzzPlugin->_downloadsCacheMiss(Object(FileCache), NULL)
#2 C:\xampp\htdocs\journal\lib\pkp\classes\cache\FileCache.inc.php(115): GenericCache->get(NULL)
#3 C:\xampp\htdocs\journal\plugins\generic\paperbuzz\PaperbuzzPlugin.inc.php(276): FileCache->getContents()
#4 C:\xampp\htdocs\journal\plugins\generic\paperbuzz\PaperbuzzPlugin.inc.php(172): PaperbuzzPlugin->_getDownloadsJsonDecoded()
#5 C:\xampp\htdocs\journal\lib\pkp\classes\plugins\HookRegistry.inc.php(107): PaperbuzzPlugin->articleMainCallback(‘Templates::Arti…’, Array)
#6 C:\xampp\htdocs\journal\lib\pkp\classes\template\PKPTemplateManager.inc.php(1256): HookRegistry::call(‘Templates::Arti…’, in C:\xampp\htdocs\journal\plugins\generic\paperbuzz\PaperbuzzPlugin.inc.php on line 326

Am I missing a component elsewhere or is there a config file where I could make an edit so this message disappears?