Hello,

Can you help me to change the background from the login menu link?

Live Url please

Yes sorry! Here it is:

Login form: neuroinstitute.mx/index.php/2011-05-02-12-32-40

It also happens at the end of the contact form here: neuroinstitute.mx/index.php/contacto

Your booking extension is loading another bootstrap version and thats the reason why.
Please add this code to your css/custom.css to fix the form background

.well {
background: none !impoartant
}

hello again. I think I messed up something. While I was waiting for the answer on how to change the background I tried to do it by myself changing the "background" in the customization for the form. I went to Customization my own template -> Form -> background -> and I just insert the number of RGB color I wanted and suddenly I can not enter anymore to the customization link
I didn't click save or anything after I input the number value, the page just refreshed and now I can get this message every time I try to enter again "LESS Runtime error."

Delete the created style and create a new style with customizer.
And just insert the HEX code into the background field