Fetching remote data from the REST service works, basic drawing too.

That's a first prototype.

src/Maze.js

@@ -2,9 +2,14 @@ import React from 'react';
 import Row from "./Row";
 
 
-export default function Maze({labyrinth}) {
+export default function Maze({labyrinth, showSolution = false}) {
+    if (!labyrinth.grid) {
+        return <div>No valid maze.</div>
+    }
+
     const maze = labyrinth.grid.map((row, rowIdx) => <Row key={"r" + rowIdx} spec={row}
-                                                          index={rowIdx}/>);
+                                                          index={rowIdx}
+                                                          showSolution={showSolution}/>);
     return (
         <div className={"maze"}>
             {maze}