My site is https://vtc.vn/tieu-diem/ty-gia-usd.html about internet marketing where i share my personal case studies and tips how we can start to make money online without getting scammed. I have struggled alot before so i am sharing my success with others to motivate them and help them to earn online.
Problem is that my site is showing errors while changing theme but when i again goes back to the theme that is already installed it works fine what would be the problem with it.
Other thing that my desktop speed is fine but my mobile speed is very slow.
Can any one tell any fix for this issue.