Comment: Installation problem

I use not to intervene here but I asked exactlectly the same question on the forum in french, and Bernard answered to me that this message indicates simply that YACS could not, temporarily, get the access to the MySQL server. This is happening from time to time because of the separation of web services and data bases on different physical machines, explained Bernard.
In that case, the problem should not last.
The problem can happen too, if you not correctly adressed the name of your data base when you were configurating YACS just after you installed it. I already met this problem because I forgot one letter and did not reproduce correctly the name of my data base.
Hope this could be helpfull to you.