cloudExplorer | Cloud Explorer is a open-source S3 client | Cloud Storage library

I'm relatively new to Spectron and Jest and I can't figure out why the app isn't launching when I call app.start() in my unit test. Right now when I run npm test, the app won't start, eventually times out (even after 30 seconds) and always sends this error message:

Timeout - Async callback was not invoked within the 15000 ms timeout specified by jest.setTimeout.Error: Timeout - Async callback was not invoked within the 15000 ms timeout specified by jest.setTimeout. at mapper (node_modules/jest-jasmine2/build/queueRunner.js:27:45)

So far I've tried:

• making sure I'm using the correct versions of spectron and electron (11.0.0 and 9.0.0 respectively)
• running npm test from my root folder, my src folder, and my tests folder.
• deleting my node_modules folder, reinstalling everything, and rebuilding the app.
• using path.join(__dirname, '../../', 'node_modules', '.bin', 'electron') as my app.path.

Here's my test1.js file:

I'm working on an electron app, using React on the front end and I'm attempting to use Jest for testing. However, when I try to run tests I get the following error:

SyntaxError: C:\Users\JimArmbruster\source\repos\cyborg_cloud_explorer\cyborg_cloud_explorer_gui\src\assets\custom_components\stylesheets\buttons.css: Support for the experimental syntax 'decorators-legacy' isn't currently enabled (1:1):

Typing in Visual Studio feels often very sluggish. Like I'm typing in mud. I tried researching this forever on Google, but can't find a cause.

I have a high performance laptop that has no problems with running other tools. I have the feeling that it wasn't a problem in the beginning.

Is there somehow that I can debug performance of Visual Studio itself? Maybe it's some rogue extension or option that I can disable, because I don't use it anyway.

After every letter I type I see VS starts "low running background tasks" light up:

Despite that I assume it shouldn't have influence on typing performance, I want to exclude everything.

I also found the Performance Manager, but it seems to be empty:

Question:

Is there any way to debug VS performance myself? To i.e. find rogue settings or extensions?

Update:

As asked by @rustyx, here is an export. I use at the moment VS 2019 Preview - but I'm having the same problems with the normal release. Should be pretty vanilla.