@ciorici
Thank you for your reply.
Of course I understand.
As for the problem it’s quite strange because I’ve been using your plugin for more than six months and I’ve never got this problem before today.
I’m still waiting for my webhost to reply to see if the problem is fixed with what I did (WP & Instagram Widget plugin updates), if not I’d probably use another plugin as you suggested.
I hope you’ll be able to find out where it comes from in the future.
Thank you again for your reply.