Mobile Usability issues

Hello David,

I just received this email from Google

Mobile Usability issues detected on

To the owner of

Search Console has identified that your site is affected by 1 Mobile Usability issues:

Top Issues

The following issues were found on your site:

Clickable elements too close together

We recommend that you fix these issues when possible to enable the best experience and coverage in Google Search.
Can you tell me how to fix this?
Thank you,