Hi,
Thank you for trying our plugin. We also use the Darklup plugin with Litespeed cache-enabled websites, we didn’t face any problems.
After hearing about your problem, we manually checked for the error you mentioned on multiple websites where the Litespeed plugin is installed. But we didn’t get that error.
In general, the Darklup plugin has no issues with Litespeed Plugin. Please email us at [email protected] with relevant screenshots to help you further with your website.
We will help you to fix any issues with the Darklup plugin.