Jquery Problem on Wp-Explorer's Adapt Theme

I am using the Adapt theme from wp explorer:
https://www.wpexplorer.com/adapt-free-responsive-wordpress-theme/

This theme is uses flex-slider for the slider w/c contains jquery.

It also have a super-fish for the drop down menu for sub menus it also have jquery.

Recently I added a new plugin for newsletter (wysija-newsletters):

https://www.ads-software.com/extend/plugins/wysija-newsletters/

When I added this plugin as HTML format and then put it on one my footer widgets the flex slider and super fish menu is not working anymore. I dont know if the problem is the jquery versions.

I dont know how to solve it. Also I added my own jquery codes on my site (timer jquery) but again everything got mess up.

Please Help me if you know how to solve this issue.

Thanks. Bless u!