Plugins updates but it says failed to update

I have hundreds of websites on WPMU and the update WPMU Dashboard fails every single time and folder permissions are correct.

I have tried inside wpmu and in wp-adminthe only way it updates (slower) is via traditional plugin page in wp its been an issue for a while and i hoped you would have fixed by now, all other plugins do not experience this issue.

THe plugins are updated but can’t check if this is really happening on thousand websites.