My test shows the message "TestGenerator: unmatched data error" and does not start

That message means that there is a problem with your historical data. It often indicates that you do not have enough data for the test you are performing. This may be the case if you are using the Every Tick model, since this requires 1 min data, which is not always available from brokers for extended historical periods

The best advice is to try a single test first in a shorter period using the Open Price Only model. If the problem persists, it might be better to change your broker.