aggregated rating doesn't work

Hi Igor,
Thanks for your interesting plug in, it is so useful and helpful => thanks so much.
The rating plugin works fine, but when I activate the use aggregated rating checkbox, I couldn’t find rich data added to the html code (schema.org).
And I found an error in my web server log, I hope this help:

[:error] [pid 5098] [client x.x.x.x:32789] WordPress database error Table ‘wordpress.wp_spr_votes’ doesn’t exist for query ALTER TABLE wp_spr_votes\r\n CHANGE COLUMN user_id user_id TINYTEXT NULL COLLATE ‘utf8_unicode_ci’ AFTER post_id; made by activate_plugin, include_once(‘/plugins/simple-rating/rating.php’), upgrade, referer: https://mywebsite.com/wp-admin/update.php?action=upload-plugin&package=136&_wpnonce=e8c8c8fdb0

[:error] [pid 5098] [client 192.168.1.101:32789] PHP Warning: array_diff_key(): Argument #2 is notaggregated rating an array in /pathtomywebsitefolter/wp-content/plugins/simple-rating/rating.php on line 509, referer: https://mywebsite.com/wp-admin/update.php?action=upload-plugin&package=136&_wpnonce=e8c8c8fdb0

website:
freelancer english exam

https://www.ads-software.com/plugins/simple-rating/