title: python tkinter error: unknown option "-font" for LabelFrame
body: <p>I'm trying to configure my <code>LabelFrame</code> widget in <code>tkinter</code> but I'm getting an error.</p>
  <p>Here is my code where it says the error is.</p>
  <pre><code>from tkinter import *
  from tkinter.ttk import Labelframe
      
  class RMS:
      def __init__(self, root):
          self.root = root
          self.root.title(&quot;Student Result Management System&quot;)
          self.root.geometry(&quot;1920x1080+0+0&quot;)
          self.root.config(bg=&quot;white&quot;)
          
          #===MENUE===#
          M_Frame=Labelframe(self.root,text=&quot;Menus&quot;,font=(&quot;times new roman&quot;,15),bg=&quot;white&quot;)
          M_Frame.place(x=10,y=70,width=1340,height=80)
                 
  if __name__ == &quot;__main__&quot;:
      root = Tk()
      obj = RMS(root)                                                                                              
      root.mainloop()
  </code></pre>
  <p>It is showing error: unknown option &quot;-font&quot;</p>
  <p>Full traceback:</p>
  <pre><code>Traceback (most recent call last):
    File &quot;C:\Users\user\OneDrive\Projects\Python\StackOverflow\teest.py&quot;, line 23, in &lt;module&gt;
      obj = RMS(root)
    File &quot;C:\Users\user\OneDrive\Projects\Python\StackOverflow\teest.py&quot;, line 17, in __init__
      M_Frame = Labelframe(self.root, text=&quot;Menus&quot;, font=(&quot;Arial&quot;, 15), bg=&quot;white&quot;)
    File &quot;C:\Users\user\AppData\Local\Programs\Python\Python310\lib\tkinter\ttk.py&quot;, line 773, in __init__
      Widget.__init__(self, master, &quot;ttk::labelframe&quot;, kw)
    File &quot;C:\Users\user\AppData\Local\Programs\Python\Python310\lib\tkinter\ttk.py&quot;, line 552, in __init__
      tkinter.Widget.__init__(self, master, widgetname, kw=kw)
    File &quot;C:\Users\user\AppData\Local\Programs\Python\Python310\lib\tkinter\__init__.py&quot;, line 2601, in __init__
      self.tk.call(
  _tkinter.TclError: unknown option &quot;-font&quot;
  
  Process finished with exit code 1
  
  </code></pre>