fix types

cli/src/commands/dev/index.ts

@@ -215,7 +215,10 @@ export default class DevCommand extends BaseCommand {
     // Whenever any of the env files change, copy to the build directory.
     // The runtime will automatically reload them when it detects a change to the copies in the build folder.
 
-    const onAddOrChange = async (sourcePath: string) => {
+    const onAddOrChange = async (sourcePath: string | Error) => {
+      if (sourcePath instanceof Error) {
+        return;
+      }
       const filename = path.basename(sourcePath);
       const outputPath = path.join(appPath, "build", filename);
       try {
@@ -245,6 +248,9 @@ export default class DevCommand extends BaseCommand {
       .on("add", onAddOrChange)
       .on("change", onAddOrChange)
       .on("unlink", async (sourcePath) => {
+        if (sourcePath instanceof Error) {
+          return;
+        }
         const filename = path.basename(sourcePath);
         const outputPath = path.join(appPath, "build", filename);
         try {