WordPress website link problem

Hello,

I am fairly new to wordpress development. I have made a website for a client with the following address: rainbowindustries.net

Whenever I goto the above URL it shows these “?v=b9698b854622” added to all the links.
i.e.
https://rainbowindustries.net/about-us/?v=b9698b854622
https://rainbowindustries.net/?v=b9698b854622

Can somebody please help to remove this, it has appeared out of no where.
Any help would be appreciated.

Kind Regards

• This topic was modified 6 years, 5 months ago by salikyousuf.

The page I need help with: [log in to see the link]