Help please! Error!!

Hello,

I’ve installed the Wext testimonial slider but got this error:
Warning: include_once(inc/extra.php): failed to open stream: No such file or directory in /home/englis00/public_html/wp-content/plugins/wext-testimonial-slider/wext-tmslider-main-function.php on line 190

Warning: include_once(): Failed opening ‘inc/extra.php’ for inclusion (include_path=’.:/usr/local/php56/pear’) in /home/englis00/public_html/wp-content/plugins/wext-testimonial-slider/wext-tmslider-main-function.php on line 190

I’ve deleted the plugin but I still get the error and I cannot login to my wordpress admin anymore!!!! HELP… Please!?

Thank you,

Tessa

https://ww.wp.xz.cn/plugins/wext-testimonial-slider/