can not update WordPress 4.6.1 (installation failed)

I only want to update to the new version of wordpress 4.6.1 (dutch version)

After trying to install , WordPress says:

The new version can not be unpacked
The installation has failed.

What should i do next?

• This topic was modified 8 years, 2 months ago by lieven23.
• This topic was modified 8 years, 2 months ago by lieven23.