To resolve it – I downloaded the latest version of WordPress
I unzipped the downloaded folder and copied the functions.php file from wp-includes. Using FTP I pasted the new functions.php into the wp-includes directory onto my web hosting, when asked if I wanted to overwrite existing file I said yes.
I now have access to the Dashboard and my blog. Thank you
If that doesn’t resolve the issue, try downloading WordPress again and delete then replace your copies of everything except the
wp-config.php file and the
/wp-content/directory and wp-admin with fresh copies from the download. This will effectively replace all of your core files without damaging your content and settings. Some up loaders tend to be unreliable when overwriting files, so don’t forget to delete the original files before replacing them.