VSTi do not load up anymore

Hi,
Suddenly, VSTi stoped working in Notion, so I can't use it anymore. When I'm attempting to load VSL Ensemble Pro I get a ! mark on the mixer and the error message there says something like that the samples are missing, however there is no sample associate with Ensemble Pro.
I also tried Kontakt I got the same problem...
Anybody else experienced this? Any fix?
I'm really starting to wonder if that was a really good idea to start using Notion...
Thanks.
Suddenly, VSTi stoped working in Notion, so I can't use it anymore. When I'm attempting to load VSL Ensemble Pro I get a ! mark on the mixer and the error message there says something like that the samples are missing, however there is no sample associate with Ensemble Pro.
I also tried Kontakt I got the same problem...
Anybody else experienced this? Any fix?
I'm really starting to wonder if that was a really good idea to start using Notion...
Thanks.