Tablesorter Colomn width

In table sorter I want to resize the colomn width with the mouse.
I have added
tablesorter:
active: true
table_nums: '1,2'
themes: blue
args:
1:
widgets:

• zebra
• filter
• resizable
  widgetOptions:
• TXTCopy

              resizable: true
  

• YAMLCopy

              resizable_widths:
                  - 20px
                  - 40px
                  - 60px
                  - 100px
  

However it doesn't work.
What am I doing wrong ?

@Mike.vdstraaten, Welcome to the forum.

Kind request to make it easy for members to help you. Don't assume people know exactly what you are talking about. Clarity is key.

• Provide links to products you are referring to.
• Properly format code/yaml snippets by using triple backticks.
• Describe what you have done in such a way others can replicate it.
• What means "It doesn't work"?
• ...