NatSkin Installation causes trouble

I installed NatSkin and NatSkin Plugin

After I added the line "Set SKIN = nat" in Main.SitePreferences on most pages an error message appears:

"Foswiki detected an internal error - please check your Foswiki logs and webserver logs for more information. Undefined subroutine &Foswiki::Plugins::DBCachePlugin::getTopicTitle called"

I cannot change SitePreferences anymore. When I try to save, the same error message appears.

After I installed NatSkin I executed: "sudo chown www-data:www-data /var/www/foswiki"

How can I make NatSkin working?

(I use the latest VMWare Image and did not yet configure someting else)

I appended the NatSkin installation log:

NatSkin Install.txt

-- PeterKirchner - 10 Dec 2018

See fix in Question1942.

-- MichaelDaum - 10 Dec 2018

Thank You, it looked good at the first view but now I cannot even log in: Foswiki detected an internal error - please check your Foswiki logs and webserver logs for more information. Attempt to reload Foswikipath aborted. Compilation failed in require

What went wrong?

-- PeterKirchner - 11 Dec 2018

I found the error.log but I have no idea how to fix it.

-- PeterKirchner - 11 Dec 2018

Now I disabled DBCachePlugin but it does not help.

-- PeterKirchner - 11 Dec 2018

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