lessphp fatal error

Hello, I created the wordpress site locally and then I uploaded it to my server (aruba.it) via ftp because WebMatrix did not copy the files, then I also uploaded the DB using WebMatrix. I made ??it writable folder “wp-content” but the site gives me this error: “lessphp fatal error: expected color value: /web/htdocs/www.ristorantewen.it/home/wp-content/themes/theme45540/bootstrap/less/bootstrap.less on line 62 “. The site does not show the logo and links to pages do not work. https://lnx.ristorantewen.it/
Can you help me solve it? what caused it? thanks