This is a common problem for bloggers nowadays, especially on Blogger.com.Actually There is No Fix available on the internet, But I've managed to find a fix to this problem. I got this problem recently, My followers list showed No followers and it said ''Click here to be first.'' I managed to fix it and I hope it'll work for all.
Followers not showing up on Followers widget (ie. Pics and names not showing)
How to Fix this?
This Problem usually occurs in Blogger Custom Templates with Switchable Sub-Menus. (eg. Image Below)
To Fix This Follow the Below Steps
1) Go to Blogger Dashboard > Design > Page Elements
2) Remove Followers Widget.
(Now this is a Tricky part)
3) If you have three sub menus like in above image 1.2 (assuming that you have followers widget in 3rd sub menu) then, In Page elements Add Followers widget in 4th element window.
Because 1st, 2nd and 3rd element windows represents the Sub menus, So Add Followers widget in 4th element window like in above image 1.4
4) Now Click on Save Button
Done, I hope you understand this post, Feel free to ask anything you want in Comments section, Questions are welcomed.