a little bug with lightbox – the layer is under the header

Do the following:

1) grab this custom css plugin:
https://www.tipsandtricks-hq.com/wordpress-custom-css-plugin-6413

2) Then add the following CSS tweak in there:

#jquery-lightbox {
z-index: 9999 !important;
}

Thanks for this fast answer,
Congratulation for your reactivity!

You deserve a free beer ??
Have you a paypal account?

Thank you. No need to donate ??