The CometVisu add-on was not able to find your local CometVisu-client installation in /var/www/cometvisu/
Solution
The easy way:
or
Add:
autoDownload=true
to your 'services/cometvisu.cfg' file (create it if it does not exist).
Licensing information
The manual way:
Download the latest release of the CometVisu here: CometVisu releases and extract it
and copy the 'release'-folder from the extracted archive to a local folder on your openHAB-server (e.g. /var/www/cometvisu)
Set the 'webFolder' setting in your 'services/cometvisu.cfg' to the path from the step above, e.g.:
webFolder=/var/www/cometvisu
Change the owner of the CometVisu-clients folder to openhab, e.g. for linux systems:
chown -R openhab:openhab /var/www/cometvisu
Further information:
The prerequisites for a running version of the CometVisu are:
The installed an running "CometVisu" add-on
A local installation of the CometVisu Client, the correct configured path to it and access rights for the openHAB instance
The optional installed "PHP support for CometVisu", which is not required to run, but adds some additional features
There are several reasons why this happened
You have not installed the CometVisu client on your local openHAB server yet
You do not have set the (absolute) path to your local CometVisu client in the 'conf/cometvisu.cfg' file (webFolder=<absolute-path-to-your-local-cometvisu-client>)
The openHAB service has no access rights to the local CometVisu client folder
CometVisu License Hint
The CometVisu client is licensed under GNU General Public License v3.0.
If you proceed, it will be downloaded and extracted on your openHAB server
in the folder /var/www/cometvisu.