Hi,

I had this issue before and I can't remember how it finally worked.

Today I installed a child theme and even after I deleted it, me sliders stop showing up.

The error they all show is 

Revolution Slider Error: You have some jquery.js library include that comes after the revolution files js include.
This includes make eliminates the revolution slider libraries, and make it not work.

To fix it you can:
    1. In the Slider Settings -> Troubleshooting set option:  Put JS Includes To Body option to true.
    2. Or find the double jquery.js include and remove it.

Of course I'v e done this, without any help.

Also, after hours of searching I added this to my head.tpl

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js">

It didn't work also,

Then I purchased the Slider Revolution 6, but now I know it conflicts with your elementor and went back to your Slider again.

Do you have any suggestions?

iunfortunately I cannot share the ftp credentials neither bo. 

The frontend though, is https://www.mybiopassport.com

If you have any suggestions.