How to solve these warnings on usability on mobile devices?

Hi.
Lets see if somebody can help me out.
I use OC 2.3.0.2.

Google search console are giving warnings on usability on mobile devices.
URL ends with:/index.php?route=quickcheckout/payment_method
Warnings are:
1. The clickable elements are too close together
2. No display area has been specified
3. You can not see what it says because the text is too small
Search console is showing a page like the image attached.
If I go to checkout on my site I find nothing like this, but Google seems to have found this url in some way.

I'm using Ajax Quick checkout. They says it's not related to their extension.
Before I started to use Ajax I used "Quick Checkout - Best One Page Checkout Solution". I no longer use "Quick Checkout - Best One Page Checkout Solution". In admin it's uninstalled but not deleted.

Anybody have any idea how I could solve the problem and get rid of the warnings?
Thank you for helping out.

Caused by leftovered traces in your platform. Simply use a software like TextCrawler to track in the quickcheckout link and the source location will be revealed to you.