Hello.
We've checked and don't see Joomstagram on your site, but we do see another Instagram module with broken links.
Regarding the "Failed to decrypt" issue displayed in the console, it's not a module issue. This problem typically occurs when the hosting or server providing the media (JS, CSS, images, etc.) tells the browser that they're encrypted when they aren't. Joomla tries to decrypt the file through the browser, and when it can't (because it's not encrypted), it returns the message. There are two ways to resolve this: contact your hosting provider (server) and they'll stop sending false positives. The other solution is to remove the decryption section from Joomla's .htaccess file.
Regards