For a temporary instant fix, change line 68 in mod\dataform\classes\pluginbase\entriesform.php to
call_user_func_array($func, array_merge(array(&$mform), $params));
hth
Indeed this is thrown under php7. I've opened a tracker issue for that at: CONTRIB-6632.
For a temporary instant fix, change line 68 in mod\dataform\classes\pluginbase\entriesform.php to
hth
For a temporary instant fix, change line 68 in mod\dataform\classes\pluginbase\entriesform.php to
hth