UPBGE 0.51a feedback TypeError: cannot create 'GPUShader' instances

[unaccc]

[ERROR] KX_PythonComponent[UI] - Failed to invoke the start callback.
Traceback (most recent call last):
File ".blend\nl_ui.py", line 81, in start
File ".blend\nl_ui.py", line 62, in evaluate
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\nodes\logictree.py", line 144, in evaluate
cell.evaluate()
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\nodes\actions\createuibutton.py", line 88, in evaluate
self._widget = LabelButton(
^^^^^^^^^^^^
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\ui\button.py", line 201, in init
self.add_widget(self.label)
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\ui\widget.py", line 578, in add_widget
widget.parent = self
^^^^^^^^^^^^^
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\ui\widget.py", line 231, in parent
self._build_shader()
File "F:\UPBGE\20251019-0.5a\bin\Release\5.1\python\Lib\site-packages\uplogic\ui\widget.py", line 535, in _build_shader
self._shader = gpu.types.GPUShader(self.vertex_shader, self.fragment_shader)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: cannot create 'GPUShader' instances

It occurred when I clicked "Start Preview" on node "Create Canvas".