Warning Errors

Hi, here is a warning error i’m getting in both “My Dictionary” and “Ignore List”:

Dictionary:

<th scope="row" class="check-column"><br>
<b>Warning</b>:  sprintf() expects at least 1 parameter, 0 given in <b>/Applications/XAMPP/xamppfiles/htdocs/mobomo/mobomo2016/wp-content/plugins/wp-spell-check/admin/wpsc-dictionary.php</b> on line <b>91</b><br>
</th>

Ignore List:

<th scope="row" class="check-column"><br>
<b>Warning</b>:  sprintf() expects at least 1 parameter, 0 given in <b>/Applications/XAMPP/xamppfiles/htdocs/mobomo/mobomo2016/wp-content/plugins/wp-spell-check/admin/wpsc-ignore.php</b> on line <b>63</b><br>
</th>

Any ideas? I’d just downloaded the plugin.

https://ww.wp.xz.cn/plugins/wp-spell-check/