Hey Ajifsk,
here’s how the website looks on my 1600px wide screen: screenshot. It fits a 4×4 and 1×1 tile in one row, and can fit even more tiles when viewed on larger screens. Could you please clarify what you are trying to achieve, and ideally provide a screenshot of how it looks on your machine. Thanks!
Regarding the error message, please try the following: download this archive, unzip it, and upload all three contained files via FTP into the following folder inside your WordPress install: /wp-content/plugins/twitter-widget/. After that refresh the website and let me know if the error message persists.
Sincerely,
Andrii / Satori Studio