That is the album link, indicated by the /a/ in the URL.
The direct image link ends in a file extension, such as .jpg or .png.
There are two easy ways to get the correct link when you are on PC.
1) Right-click the uploaded image, copy link
2) Click the icon with three dots on it on the right side, click on 'get share links', copy the 'BBCode (Forums)' code, which already has the IMG tags around it.
In your case that would be:
Code
[IMG]https://i.imgur.com/MI7u20W.jpeg[/IMG]