V1.3.1 major issues

I’m not sure quite what changed with v1.3.1 but it totally broke my site. Everything was working with v1.3 but upgrading to v1.3.1 seems to have disabled something. No images showed on my main page, and the CSS was majorly messed up elsewhere. I then disabled and re-enabled the plugin a couple of times and now I’m getting the following error:

ERROR 6000: Notice: This plugin requires a LiteSpeed Server with the LSCache Module enabled. If you are unable to change your server stack, please contact your hosting provider to request the required changes. This plugin will NOT work properly.

Could you advise?

Best wishes,

Dave

The page I need help with: [log in to see the link]