Readded the try except block to shifted_correlation.

mdevaluate/correlation.py

@@ -192,13 +192,22 @@ def shifted_correlation(
         )
     else:
         pool = ProcessPool(nodes=nodes)
-        result = np.array(
-            pool.map(partial(get_correlation, idx=idx, selector=selector), start_frames)
-        )
-        pool.terminate()
-        pool.restart()
+        try:
+            result = np.array(
+                pool.map(
+                    partial(get_correlation, idx=idx, selector=selector), start_frames
+                )
+            )
+        except Exception:
+            logger.warning(
+                "WARNING: Something went wrong during multiprocessing "
+                "in shifted_correlation."
+            )
+        finally:
+            pool.terminate()
+            pool.restart()
 
-    if average == True:
+    if average:
         clean_result = []
         for entry in result:
             if np.all(entry == 0):