[OJS 3.2.0.1] Error 500 in import/export part

Hi @asmecher,
my server technicians, have highlighted this log error, concerning the problem of xml export tools on the site. Can it help you to solve this problem?

[Wed May 13 10:56:53.366584 2020] [php7:error] [pid 8488:tid 140270309914368] [client 10.200.225.10:58648] PHP Fatal error: Uncaught Error: Call to a member function getAuthors() on array in /var/www/vhosts/pagepress.org/journals/plugins/generic/coins/CoinsPlugin.inc.php:74\nStack trace:\n#0 /var/www/vhosts/pagepress.org/journals/lib/pkp/classes/plugins/HookRegistry.inc.php(107): CoinsPlugin->insertFooter(‘Templates::Comm…’, Array)\n#1 /var/www/vhosts/pagepress.org/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php(1145): HookRegistry::call(‘Templates::Comm…’, Array)\n#2 /var/www/vhosts/pagepress.org/journals/cache/t_compile/511f4ab86b09dcf7d0b83e864725638a1c99f731^%%40^408^4081C66E%%footer.tpl.php(51): PKPTemplateManager->smartyCallHook(Array, Object(TemplateManager))\n#3 /var/www/vhosts/pagepress.org/journals/lib/pkp/lib/vendor/smarty/smarty/libs/Smarty.class.php(1870): include(’/var/www/vhosts…’)\n#4 /var/www/vhosts/pagepress.org/journals/lib/pkp/classes/template/PKPTemplateManager.inc.php(406): Smarty->_smarty_include(Array)\n#5 /var/www/vhosts/pagepress.org/journals/cache/t_compile/a7880fecd678218289445d88aa7710108a8 in /var/www/vhosts/pagepress.org/journals/plugins/generic/coins/CoinsPlugin.inc.php on line 74

Thanks for the support
Bye
Tiziano