[Theme: Activello] [Plugin Yoast] Unable to upload the meta tags on the website

Hi Friends,
I am using Activello theme on my website with Yopast plug-in.
I have updated the meta tags, but it doesn’t reflect on the site.
I deactivated all my plug-ins but it still doesnt reflect.
However, when i changes my theme it did reflect.
But, I want Activello theme for my website.
Kindly help me to find out the root cause of the problem and fix it asap.
Website:justlifelessons.com