Trying to run step 2 of V7.0 Results in following error

[IdsQme]

ValueError Traceback (most recent call last)
Cell In[4], line 12
1 from act_train_rhythm import *;
3 train_params_p2 = {
4 "divisor" : 4,
5 "train_epochs" : 16,
(...)
10 "data_split_count" : 80
11 };
---> 12 model_p2 = step2_build_model()

File ~\Downloads\osumapper-master\v7.0\act_train_rhythm.py:234, in step2_build_model()
233 def step2_build_model():
--> 234 model_v7 = build_model();
235 return model_v7

File ~\Downloads\osumapper-master\v7.0\act_train_rhythm.py:192, in build_model()
190 plt.figure()
191 plt.xlabel('Epoch')
--> 192 plt.ylabel('Mean Abs Error [Limitless]')
193 plt.plot(history.epoch, np.array(history.history['mean_absolute_error']),
194 label='Train MAE')
195 plt.plot(history.epoch, np.array(history.history['val_mean_absolute_error']),
196 label = 'Val MAE')

File ~\anaconda3\Lib\site-packages\keras\src\ops\operation.py:266, in Operation.output(self)
256 @Property
257 def output(self):
258 """Retrieves the output tensor(s) of a layer.
259
260 Only returns the tensor(s) corresponding to the first time
(...)
264 Output tensor or list of output tensors.
265 """
--> 266 return self._get_node_attribute_at_index(0, "output_tensors", "output")

File ~\anaconda3\Lib\site-packages\keras\src\ops\operation.py:285, in Operation._get_node_attribute_at_index(self, node_index, attr, attr_name)
269 """Private utility to retrieves an attribute (e.g. inputs) from a node.
270
271 This is used to implement the properties:
(...)
282 The operation's attribute attr at the node of index node_index.
283 """
284 if not self._inbound_nodes:
--> 285 raise ValueError(
286 f"The layer {self.name} has never been called "
287 f"and thus has no defined {attr_name}."
288 )
289 if not len(self._inbound_nodes) > node_index:
290 raise ValueError(
291 f"Asked to get {attr_name} at node "
292 f"{node_index}, but the operation has only "
293 f"{len(self._inbound_nodes)} inbound nodes."
294 )

ValueError: The layer sequential_2 has never been called and thus has no defined output.