Google Search Console says “Page is not mobile friendly”

Howdy,
I did a URL inspection of my website. The result showed that “Page is not mobile friendly”.
In the further description, two problems were highlighted.
1. Clickable elements too close together
2. Content wider than the screen.

I tried searching for a solution and found two of them.

Firstly, I tried adding this code in my robots.txt file
“Allow: /wp-content/plugins/*.js
Allow: /wp-content/cache/*.js
Allow: /wp-content/cache/*.css
Allow: /wp-includes/*.js
Allow: /wp-includes/*.png”

It didn’t work.

Secondly, I tried using mobile plugins WpTouch and AMP, but couldn’t fix it.

Can someone help me fix this problem?

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