Featured image size in standard gallery changed after web host migration

Hi!

I am stuck in the middle of migrating my website to a new host. I used ManageWP.com and with the “WP Clone” plugin (since some of the images did not migrate).

The problem is that after the migration, all of the featured images in standard gallery pages are not being showed with the correct size. As you can see in the attached files the images in the new site do not have the same size (they should all be the same size so it looks like a grid). Why did this happen? How can I fix this?

The original site is http://bsgaleria.mx/wordpress and the new (temp) site is http://50.87.248.183/~perrosli/bsgaleria_mx. I’m attaching the login credentials bellow.

Regards,

Sergio