fix: set type for caught exception e

Author: OlatunjiYso

course-04/project/c4-final-project-starter-code/client/src/components/EditTodo.tsx

@@ -58,7 +58,7 @@ export class EditTodo extends React.PureComponent<
 
       alert('File was uploaded!')
     } catch (e) {
-      alert('Could not upload a file: ' + e.message)
+      alert('Could not upload a file: ' + (e as Error).message)
     } finally {
       this.setUploadState(UploadState.NoUpload)
     }

course-04/project/c4-final-project-starter-code/client/src/components/Todos.tsx

@@ -97,7 +97,7 @@ export class Todos extends React.PureComponent<TodosProps, TodosState> {
         loadingTodos: false
       })
     } catch (e) {
-      alert(`Failed to fetch todos: ${e.message}`)
+      alert(`Failed to fetch todos: ${(e as Error).message}`)
     }
   }