protect against unforeseen issues in scanning thread

freqtrade/freqai/freqai_interface.py

@@ -205,9 +205,13 @@ class IFreqaiModel(ABC):
 
             if retrain:
                 self.train_timer('start')
+                try:
                     self.extract_data_and_train_model(
                         new_trained_timerange, pair, strategy, dk, data_load_timerange
                     )
+                except Exception as msg:
+                    logger.warning(f'Training {pair} raised exception {msg}, skipping.')
+
                 self.train_timer('stop')
 
                 # only rotate the queue after the first has been trained.