Links on mobile don't work

since some day I found a problem with links in the articles: they don’t work if you click them on mobile devices but it’s all right if you browse from pc or forcing showing the desktop version from mobile.
I tried some custom CSS text found in some topics here but it didn’t solve the problem.
Here’s the site: , you can try the links in the last articles.
Thank you in advance!

Hey there,
I hope you’re doing well today

Kindly add and save the following code to Appearance > Customize > Additional CSS:

/*Change Z-index of sidebar widget is covering the content*/
@media (max-width: 550px){
    position: relative;
    z-index: -1;

Best Regards,

Great! Fast and precise, thank you very much!

Hello there,

I am glad the solution worked for you.
Please feel free to contact us again in the future regarding any other issues.

Best Regards,