3.0: these data are not available but note your data is safe

3.0: these data are not available but note your data is safe

Some bigger views cause a message like this:
sorry, these data are not available but note your data is safe

This occurs mostly by using the search- or sort-function. Sometimes, I get an empty table (or only some cols). But very often, I get nothing but that message.

Is this a performance-problem?
If it is, in Creator 2.0, the performance of the server was better. I hadn't those errors.