@Keir: Looks like there is some conflict with slider script and your plugin script. can you try disabling plugin one by one to find the conflicting plugin. Look like there is conflict with Easy timer plugin or might be other.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.