It appears that the repository has undergone several changes and renamings:

backend/node_modules/escalade/sync/index.js

@@ -1,18 +0,0 @@
-const { dirname, resolve } = require('path');
-const { readdirSync, statSync } = require('fs');
-
-module.exports = function (start, callback) {
-	let dir = resolve('.', start);
-	let tmp, stats = statSync(dir);
-
-	if (!stats.isDirectory()) {
-		dir = dirname(dir);
-	}
-
-	while (true) {
-		tmp = callback(dir, readdirSync(dir));
-		if (tmp) return resolve(dir, tmp);
-		dir = dirname(tmp = dir);
-		if (tmp === dir) break;
-	}
-}