SharePoint App catlog showing error after adding sppkg file : Error: '=' is an unexpected token. The expected token is ';'. Line 7, position 151.

Question

I have created SPFx extension, and when I am trying to add sppkg file into catlog I am getting below error.

Error: '=' is an unexpected token. The expected token is ';'. Line 7, position 151.

Please help on this.