Backup not starting

Hi

Trying to create a backup on our multisite install.
But the backup is not starting at all.
Had the same issue a week ago, then I copied this to the .htaccess file:
Then it worked, but today it’s not working again.
Any ideas for this?

Thanks

<IfModule Litespeed>
RewriteEngine On
RewriteRule .* - [E=noabort:1]
</IfModule>

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