I am using isotope with Joomla 3.8.8
and everytime I save modification to isotope_40.css it comes back to original state.
All permissions are correctly.
Please do not post extensions/template specific questions in the "General Discussion >Configuration & Security" forum. You should post in the extension forum or template forum as appropriate. Most of these forums are for members who have a current PAID membership. Our priority is always to assist paying members.
Thank you for your understanding.
Your subscription appears to have expired. Support does require a current subscription.
You should never change the contents of those files since they will be overwritten all the time.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.