On my pages there are some links opening targets in new browser tab or in popup window. This worked fine, but sometime, somewhere, something's happened, and every links on every pages open in the original tab (no matter, what browser and what machine, tablet, phone). But this is only when the pages uploaded to the remote server - on my local computer everything works well. Moreover, I have older versions of pages, that work fine everywhere.

Can anybody help?

https://iselmo.hu

Every icon in the footer would have to open their link in new tab.

Thank you very much, it seems, that was the problem. After complete upload, now it works correctly.