Traceback (most recent call last):
  File "/home/hkon/qt_gr/grc/core/blocks/_templates.py", line 77, in render
    return template.render(**namespace)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mako/template.py", line 438, in render
    return runtime._render(self, self.callable_, args, data)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/mako/runtime.py", line 874, in _render
    _render_context(
  File "/usr/lib/python3.11/site-packages/mako/runtime.py", line 916, in _render_context
    _exec_template(inherit, lclcontext, args=args, kwargs=kwargs)
  File "/usr/lib/python3.11/site-packages/mako/runtime.py", line 943, in _exec_template
    callable_(context, *args, **kwargs)
  File "memory:0x75bb98128890", line 115, in render_body
TypeError: not all arguments converted during string formatting

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/hkon/qt_gr/grc/gui_qt/components/canvas/block.py", line 423, in mouseDoubleClickEvent
    self.open_properties()
  File "/home/hkon/qt_gr/grc/gui_qt/components/canvas/block.py", line 453, in open_properties
    self.props_dialog = PropsDialog(self.core, self.force_show_id)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hkon/qt_gr/grc/gui_qt/components/dialogs.py", line 176, in __init__
    block_constructor = block_templates.render(
                        ^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/hkon/qt_gr/grc/core/blocks/_templates.py", line 79, in render
    raise TemplateError(error, text)
grc.core.errors.TemplateError: (TypeError('not all arguments converted during string formatting'), "<%\n    win = 'self._%s_win'%id\n%>\\\nqtgui.${type.fcn}(\n    ${fftsize}, #fftsize\n    ${wintype}, #wintype\n    ${fc}, #fc\n    ${bw}, #bw\n    ${name}, #name\n    ${plotfreq}, #plotfreq\n    ${plotwaterfall}, #plotwaterfall\n    ${plottime}, #plottime\n    ${plotconst}, #plotconst\n    None # parent\n)\nself.${id}.set_update_time(1.0/${rate})\n${win} = sip.wrapinstance(self.${id}.qwidget(), Qt.QWidget)\n\nself.${id}.enable_rf_freq(${showrf})\n\n${gui_hint() % win}")