diff --git a/__mocks__/styleMock.ts b/__mocks__/styleMock.ts
new file mode 100644
index 0000000000..a099545376
--- /dev/null
+++ b/__mocks__/styleMock.ts
@@ -0,0 +1 @@
+module.exports = {};
\ No newline at end of file
diff --git a/package.json b/package.json
index efcf47fed8..9983c3eb66 100644
--- a/package.json
+++ b/package.json
@@ -67,6 +67,9 @@
     "testEnvironment": "node",
     "transform": {
       "^.+\\.tsx?$": "ts-jest"
+    },
+    "moduleNameMapper": {
+      "\\.(css|scss)$": "<rootDir>/__mocks__/styleMock.ts"
     }
   },
   "build": {
diff --git a/src/common/kube-helpers.ts b/src/common/kube-helpers.ts
index 3df03a8211..3709f0ac94 100644
--- a/src/common/kube-helpers.ts
+++ b/src/common/kube-helpers.ts
@@ -16,7 +16,7 @@ function resolveTilde(filePath: string) {
 
 export function loadConfig(pathOrContent?: string): KubeConfig {
   const kc = new KubeConfig();
-  
+
   if (fse.pathExistsSync(pathOrContent)) {
     kc.loadFromFile(path.resolve(resolveTilde(pathOrContent)));
   } else {
@@ -160,7 +160,7 @@ export async function getKubeConfigLocal(): Promise<string> {
     const file = await readFile(configFile, "utf8");
     const obj = yaml.safeLoad(file);
     if (obj.contexts) {
-      obj.contexts = obj.context.filter((ctx: any) => ctx?.context?.cluster && ctx?.name)
+      obj.contexts = obj.contexts.filter((ctx: any) => ctx?.context?.cluster && ctx?.name)
     }
     return yaml.safeDump(obj);
   } catch (err) {
diff --git a/src/main/index.ts b/src/main/index.ts
index f608490ed1..73a5843840 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -30,7 +30,7 @@ if (app.commandLine.getSwitchValue("proxy-server") !== "") {
 }
 
 async function main() {
-  shellSync(app.getLocale());
+  await shellSync();
 
   const workingDir = path.join(app.getPath("appData"), appName);
   app.setName(appName);
diff --git a/src/main/kubectl.ts b/src/main/kubectl.ts
index 6a2d18e864..ee1c0efdc7 100644
--- a/src/main/kubectl.ts
+++ b/src/main/kubectl.ts
@@ -289,7 +289,7 @@ export class Kubectl {
   }
 
   protected getDownloadMirror() {
-    const mirror = packageMirrors.get(userStore.preferences.downloadMirror)
+    const mirror = packageMirrors.get(userStore.preferences?.downloadMirror)
     if (mirror) {
       return mirror
     }
diff --git a/src/main/port.ts b/src/main/port.ts
index a938ff4ae3..b253d3590a 100644
--- a/src/main/port.ts
+++ b/src/main/port.ts
@@ -6,7 +6,8 @@ import logger from "./logger"
 export async function getFreePort(): Promise<number> {
   logger.debug("Lookup new free port..");
   return new Promise((resolve, reject) => {
-    const server = net.createServer().unref().listen({ port: 0 });
+    const server = net.createServer()
+    server.unref()
     server.on("listening", () => {
       const port = (server.address() as AddressInfo).port
       server.close(() => resolve(port));
@@ -16,5 +17,6 @@ export async function getFreePort(): Promise<number> {
       logger.error(`Can't resolve new port: "${error}"`);
       reject(error);
     });
+    server.listen({ host: "127.0.0.1", port: 0 })
   })
 }
diff --git a/src/main/shell-sync.ts b/src/main/shell-sync.ts
index 101fd46bc9..373d0a36ba 100644
--- a/src/main/shell-sync.ts
+++ b/src/main/shell-sync.ts
@@ -1,5 +1,7 @@
 import shellEnv from "shell-env"
 import os from "os";
+import { app } from "electron";
+import logger from "./logger";
 
 interface Env {
   [key: string]: string;
@@ -9,14 +11,21 @@ interface Env {
  * shellSync loads what would have been the environment if this application was
  * run from the command line, into the process.env object. This is especially
  * useful on macos where this always needs to be done.
- * @param locale Should be electron's `app.getLocale()`
  */
-export function shellSync(locale: string) {
+export async function shellSync() {
   const { shell } = os.userInfo();
-  const env: Env = JSON.parse(JSON.stringify(shellEnv.sync(shell)))
+
+  let envVars = {};
+  try {
+    envVars = await shellEnv(shell);
+  } catch (error) {
+    logger.error(`shellEnv: ${error}`)
+  }
+
+  const env: Env = JSON.parse(JSON.stringify(envVars));
   if (!env.LANG) {
     // the LANG env var expects an underscore instead of electron's dash
-    env.LANG = `${locale.replace('-', '_')}.UTF-8`;
+    env.LANG = `${app.getLocale().replace('-', '_')}.UTF-8`;
   } else if (!env.LANG.endsWith(".UTF-8")) {
     env.LANG += ".UTF-8"
   }