Background Updates Not Working as Expected

I have had this message for a while no in the site health tab however i am unable to resolve this issue.

I have tested and tried each plugin to make sure these are not causing any issues and this message still appears. I have deactivated all the plugins at once and even deleted plugins and themes yet this does not resolve this issue.

Any help is appreciated thank you.

In full is the message that it displays:

Background updates ensure that WordPress can auto-update if a security update is released for the version you are currently using.

Error A plugin has prevented updates by disabling wp_version_check().
Passed No version control systems were detected.
Passed Your installation of WordPress doesn’t require FTP credentials to perform updates.
Error Some files are not writable by WordPress:
xmlrpc.php
wp-blog-header.php
readme.html
wp-signup.php
index.php
wp-cron.php
wp-config-sample.php
wp-login.php
wp-settings.php
license.txt
wp-mail.php
wp-links-opml.php
wp-load.php
wp-includes/class-wp-user-query.php
wp-includes/l10n.php
wp-includes/date.php
wp-includes/class-wp-oembed.php
wp-includes/images/w-logo-blue-white-bg.png
wp-includes/images/blank.gif
wp-includes/images/down_arrow.gif
…