Can't watch friend matches: Invalid number of arguments for event in DispatchEvent for DOTASpectateFriend

[alitoufighi]

Your system information

• System information from steam: https://gist.github.com/alitoufighi/4edcb6c18bdbd28e1f435e9b7da85f96
• Have you checked for system updates?: Yes
• Are you using the latest stable video driver available for your system? Yes (Not sure actually, since it's an on-board graphics and doesn't have usual updates, however I'm sudo apt upgraded!)
• Have you verified the game files?: No, but I haven't made any edits to the game.

Here's the line shown in the console when I click on "Watch Game" on my friend's profile:

[PanoramaScript] !! (panorama/layout/dashboard_page_profile.xml, line:111, col:19) - Invalid number of arguments for event in DispatchEvent for DOTASpectateFriend

However I can watch the game if I click on the eye icon in the home page near their party. I'm open to provide any additional information if needed. P.S. I hadn't tested this previously so I can't tell if this is happening after a certain update

[alitoufighi]

I have another update. If the user is not in a party, the eye icon is not there, however, I can still watch their game by right-clicking on their profile picture and click on "watch game". The only case where it doesn't work is inside their profile.