GNS3 not opening a project (.gns3 file)

Hello community,

I had saved GNS3 project months earlier. I had updated GNS3 multiple times after the project was created. My issue is when I double click .gns3 file , the following error is prompted.


The same project if I try to open from Project Library, it opens. The problem is I don’t have my old projects listed in Project Library and the only option for me is double clicking .gns3 file.

I tried changing permissions of the file to root yet it didn’t help. Please help to fix this.