WordPress 5.2 Fatal Error Updraft Plus

Receiving this email daily:

Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

Error Details
=============
An error of type E_ERROR was caused in line 1995 of the file /home/jerry309/public_html/wordpress/wp-content/plugins/updraftplus/backup.php. Error message: Allowed memory size of 268435456 bytes exhausted (tried to allocate 64926016 bytes)

I’ve searched the support forums and Google, and haven’;t found a saolution.
WordPress, all plugins and site theme are up to date.
Checked the backup.php file, and lines 1994-1996 are:

} else {
$values[] = “0x” . bin2hex(str_repeat(“0”, floor(strspn($value, “0”) / 4)).$value);
}

The page I need help with: [log in to see the link]