PS4 Fortnite Update can't be installed. Do you have a tip for me?

tr
- in PlayStation
3

I try now for 2 days in vain to install the Fortnite Update 2.37 on my son's PS4. The message always appears: "The update file can't be installed".
What have I already done?
PS4 restarted
Internet connection checked
Update file deleted and re-downloaded
Messages of PS4 deleted
Checked accounts
enough space
PS4 software up to date
I have no idea what else to do. But do not know me so well on the PS4. Solutions?

pa

Your memory is full delete some pictures or videos. Did you try that?

tr

According to the system are still 400GB free. The update itself has something with 5.1GB. So it should be free enough memory. Or do I understand something wrong?

tr

Yesterday all screenshots etc deleted. Memory is enough there. I do not know how to continue.