fix

src/install-plugin.ts

@@ -88,7 +88,10 @@ async function tryInstallPackages(names: string[]) {
 }
 
 async function installPlugin(name: string, info: any) {
-  const version: string = info.$version || info.$install;
+  const version: string =
+    info.$version || typeof info.$install === 'string'
+      ? info.$install
+      : undefined;
   if (name.match(/^([\.\/~\\]|[A-Za-z]:[\/\\])/)) {
     logger.info(`Plugin ${name} is a local plugin, skipping.`);
     return;