Cannot submit reviews – Division by zero error

I keep seeing the following errors when I try to test out the review plugin locally. I have not modified any part of the plugin and I only have 2 plugins running on my local test install. Has this error been seen before and is this a configuration issue I would need to adjust in the settings or is this a plugin related issue?

<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>580</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>581</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>584</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>585</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>588</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>206</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>580</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>581</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>584</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>585</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>588</b><br />
<br />
<b>Warning</b>:  Division by zero in <b>C:\Program Files (x86)\Ampps\www\skitest\wp-content\plugins\multi-rating\includes\class-api.php</b> on line <b>206</b><br />
{"status":"success","data":{"sequence":"1","post_id":"17","html":"<span class=\"rating-result rating-result-17 after_title mr-filter\">\n\t<span class=\"mr-star-rating\">\n\t\n\t\t    <i class=\"fa fa-star mr-star-full\"><\/i>\n\t    \t    <i class=\"fa fa-star mr-star-full\"><\/i>\n\t    \t    <i class=\"fa fa-star-o mr-star-empty\"><\/i>\n\t    \t    <i class=\"fa fa-star-o mr-star-empty\"><\/i>\n\t    \t    <i class=\"fa fa-star-o mr-star-empty\"><\/i>\n\t    <\/span>\n\n<span class=\"star-result\">\n\t1.81\/5<\/span>\t\t\t<span class=\"count\">(7)<\/span>\n\t\t\t<\/span>","rating_result":{"adjusted_star_result":1.81,"star_result":1.81,"total_max_option_value":50,"adjusted_score_result":18.14,"score_result":18.14,"percentage_result":36.29,"adjusted_percentage_result":36.29,"count":7,"post_id":"17"},"hide_rating_form":false},"message":"Your rating was 2.7\/5.","validation_results":[]}

https://ww.wp.xz.cn/plugins/multi-rating/