The MATROOS web service from the Dutch Rijkswaterstaat changes to a secure SSL connection. That means that the address in the url changes from http://matroos.rws.nl to https://matroos.rws.nl.
This article describes how you can configure FEWS to use the https method. This applies to any import from Matroos, so for importypes like noos_timeseries.
Delft-FEWS is based on JAVA and JAVA does not have by default this certificate in it's distribution. Unlike popular browsers like Firefox, Chrome or IE. Therefore the certificate should be made known to JAVA using the below approach.
Add the steps involved:
See also the general information on the generation of client truststores at
Here is described how you can generate your own client truststore file, for example using a private password.