Dashboard USMSI section never loads up

I am really sorry for posting my problem twice in other people’s topics. I just found the info, that I need to open my own topic. So please do not see it as a third message, just trying to write the problem where it needs to be written.

My problem is with Ultimate social media plugin. Inside my dashboard, when I try to access USMSI – I am getting the spinning loading symbol. Page never loads up.

I have tried different browser, tried deleting it and installing the plugin again, nothing worked. It worked before, then I have tried saving some settings, the wheel began to spin saying “saving” but it never stopped. So I reloaded the page thinking it just crashed due to bad internet connection. After that the settings do not load any more.