Slideshow Instagram integration not stable

are both sites on the same server ?

No, they are on different servers

ok then can you give me a FTP access by email ? I will need to check what is wrong

thank you for the FTP access, I have found the problem

The issue is Instagram has restricted their unlogged-in (guest) access (most likely based on IP address).

After a large amount of queries to their servers, they will begin showing a "Please login" page

they want you to have a API Key for every User who wishes to pull their photos

unfortunately for now I have no solution, I will need to work on a solution with an API key, but this means that you will need to ask for that key ...
shame from Instagram !
I will let you know if I find more infos on that

Well, then I'm waiting for a solution

please check now, I have updated the plugin+component on your website, it works by my side
please confirm if everything is ok now