Fatal error

Hello!

I have a problem with plugin. It doesn’t appear on the sidebar http://yepman.ru/
When I try to check logs, I see the message:
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 80 bytes) in /home/wm2285/public_html/wp-includes/wp-db.php on line 1977
Can you help?

Thanks.

https://ww.wp.xz.cn/plugins/yop-poll/