Today I noticed I had a data base error. So I started reading online and tried the define('WP_ALLOW_REPAIR', true); on wp-config.php and it worked.
I went to create a post and noticed that no images appear on the media library. I deactivated all pluggins, but it didn´t work. I also changed theme but I still have the same problem of images not showing.
I also notice that I can not see the previews. When I press the tab preview, a blank page opens.
Im not an expert, Im only a girl with a blog. If someone can help me I really would appreciate it.