Add to homescreen not working

@nhattinh – there are a few errors on your site the easiest to update being a ico file for the site icon. You can try replacing the same to a png file via WordPress Admin section > Appearance > Customize – upload a 512X512 px file and see. Hopefully your issue should be resolved.

I don’t know why but i had replaceing png file and it’s still not working when i click on the button

@nhattinh Ya now its a png file. But hope you have selected under Progressive WP > Add to Homescreen > in that
Show “add to homescreen” banner > On element click
then in the text box below it (Element) here write the class you have given the button
Also have you custom coded the footer popup section for the button click?
As it seems to hide the display and secondly in your header there is some extra code which shows extra

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Also footer section card icons are not being displayed.

@cmsnext Thanks for your help. I’m fix and it is working now. But it’s just work on Android, not show button on iOS. Can you help me try again ?