After installation:

Fatal error: Uncaught Error: Call to undefined function wibar_theme_favicon() in /web/htdocs/www.degustami.it/home/wp-content/themes/wibar/header.php:24
Stack trace:
#0 /web/htdocs/www.degustami.it/home/wp-includes/template.php(730): require_once()
#1 /web/htdocs/www.degustami.it/home/wp-includes/template.php(676): load_template('/web/htdocs/www...', true, Array)
#2 /web/htdocs/www.degustami.it/home/wp-includes/general-template.php(48): locate_template(Array, true, true, Array)
#3 /web/htdocs/www.degustami.it/home/wp-content/themes/wibar/page.php(19): get_header('layout1')
#4 /web/htdocs/www.degustami.it/home/wp-includes/template-loader.php(106): include('/web/htdocs/www...')
#5 /web/htdocs/www.degustami.it/home/wp-blog-header.php(19): require_once('/web/htdocs/www...')
#6 /web/htdocs/www.degustami.it/home/index.php(17): require('/web/htdocs/www...')
#7 {main} thrown in /web/htdocs/www.degustami.it/home/wp-content/themes/wibar/header.php on line 24

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pending correction I put the page index.htm to not show the error to users.