Error if repo source missing

[prydonius]

Subscriber.js:227 Uncaught TypeError: Cannot read property 'match' of undefined
    at t.maintainerUrl (chart-details-info.component.ts:53)
    at e.detectChangesInternal (chart-details-info.component.ngfactory.ts:313)
    at e.t.detectChanges (view.js:425)
    at t.detectChangesInNestedViews (view_container.js:67)
    at e.detectChangesInternal (chart-details-info.component.ngfactory.ts:607)
    at e.t.detectChanges (view.js:425)
    at e.t.internalDetectChanges (view.js:410)
    at e.detectChangesInternal (chart-details.component.ngfactory.ts:433)
    at e.t.detectChanges (view.js:425)
    at t.detectChangesInNestedViews (view_container.js:67)
    at e.detectChangesInternal (chart-details.component.ngfactory.ts:551)
    at e.t.detectChanges (view.js:425)
    at e.t.internalDetectChanges (view.js:410)
    at e.detectChangesInternal (chart-details.component.ngfactory.ts:95)
    at e.t.detectChanges (view.js:425)

[javad-hajiani]

I'd like to work on this, if possible