Errors when updating Enfold from 441 to 451

Hello
I wanted to update the Enfold theme from 441 to 451
but there were errors (see log).
I tried several times, but with the same result.
How can I overcome the problem?
Thank you
Pino

LOG:
Aggiornamento del tema Enfold (1/1)

Warning: preg_match() expects parameter 2 to be string, array given in /home/beatopad/public_html/en/wp-admin/includes/class-wp-upgrader.php on line 258

Warning: file_exists() expects parameter 1 to be a valid path, array given in /home/beatopad/public_html/en/wp-admin/includes/class-wp-upgrader.php on line 258

Warning: strip_tags() expects parameter 1 to be string, array given in /home/beatopad/public_html/en/wp-admin/includes/class-bulk-upgrader-skin.php on line 61
Download dell’aggiornamento da …

Warning: parse_url() expects parameter 1 to be string, array given in /home/beatopad/public_html/en/wp-admin/includes/file.php on line 970

Warning: preg_split() expects parameter 2 to be string, array given in /home/beatopad/public_html/en/wp-includes/kses.php on line 1325

Warning: strtolower() expects parameter 1 to be string, array given in /home/beatopad/public_html/en/wp-includes/http.php on line 517

C’è stato un errore durante l’aggiornamento di Enfold: Il download non è andato a buon fine. Non è stata fornita una URL valida.