As I mention in the title of the post, I have an error in Wordpress since I uploaded a custom theme from the panel.
To start I have to say that this theme works perfectly working from local, the errors start after compressing the theme and upload it to a web page.
Every time I want to customize something from the Wordpress customization bar I get this error:
"It looks like something went wrong, wait a couple of seconds and try again."
It also affects when I want to make a change from the administration panel, when I want to choose an image from the media library it stays as searching and finds nothing, when I want to deactivate or activate a plugin the screen remains blank ( although the action is carried out).
If someone can help me I would be grateful