PHP errors

Hi there,
I get multiple errors when I try to save the plugin settings. On the domain, I have PHP 7.1.20

Notice: Undefined index: port in .../wp-content/plugins/eu-cookie-law/defaults.php on line 53

Notice: Undefined index: closelink in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: boxcontent in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: tinymcebutton in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: scrollconsent in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: navigationconsent in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: networkshare in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: onlyeuropean in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: customurl in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: networkshareurl in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Notice: Undefined index: exclude_script in .../wp-content/plugins/eu-cookie-law/defaults.php on line 34

Any suggestions?

Thank you so much, best regards