Extensions fail to low with Error loading webview: Error: Could not register service worker: InvalidStateError: Failed to register a ServiceWorker: The document is in an invalid state..

[sammcj]

Type: Bug

After updating VSCode this morning I have multiple extensions fail to load with "Error loading webview: Error: Could not register service worker: InvalidStateError: Failed to register a ServiceWorker: The document is in an invalid state.."

VSCode provides no useful error information or detail as to why.

VS Code version: Code 1.99.3 (17baf84, 2025-04-15T23:18:46.076Z)
OS version: Darwin arm64 24.4.0
Modes:

System Info

Item	Value
CPUs	Apple M2 Max (12 x 2400)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: enabled_on direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled webgpu: enabled webnn: disabled_off
Load (avg)	30, 28, 27
Memory (System)	96.00GB (20.03GB free)
Process Argv	--log github.copilot=warn --log ms-python.python=warn --log golang.go=warn
Screen Reader	no
VM	0%

Extensions (171)

Extension	Author (truncated)	Version
svelte-bundle	1Yi	1.0.0
terraform	4op	0.2.5
better-comments	aar	3.0.2
actionforge	Act	0.9.84
vscode-base64	ada	0.1.0
terraform-live-graph	ada	0.0.5
vscode-sievehighlight	adz	1.0.7
klipper-config	aer	0.1.6
vscode-nginx-conf	ahm	0.3.5
hugofy	akm	0.1.1
project-manager	ale	12.8.0
rtf	ale	2.8.1
svelte-intellisense	ard	0.7.1
hugo-partials-defs	art	0.4.0
astro-vscode	ast	2.15.4
jsoncrack-vscode	Ayk	3.0.0
expect	bda	1.0.1
markdown-mermaid	bie	1.28.0
LinkCheckMD	bla	0.3.1
mermaid-markdown-syntax-highlighting	bpr	1.7.0
language-hugo-vscode	bud	1.3.1
indented-block-highlighting	byi	1.0.7
multi-cursor-case-preserve	Car	1.0.5
vscode-better-align	cho	1.4.2
markdown-paste-image	chr	0.0.6
npm-intellisense	chr	1.4.5
path-intellisense	chr	2.10.0
regex	chr	0.5.1
systemd-unit-file	coo	1.0.6
vscode-mermaid-extension	d8a	1.0.3
aws-cloudformation-yaml	Dan	0.2.2
markdown-table-prettify	dar	3.6.0
vscode-markdownlint	Dav	0.59.0
vscode-eslint	dba	3.0.10
binary-plist	dni	0.11.4
docker	doc	0.4.9
githistory	don	0.6.20
udev-rules	dpk	1.0.1
vscode-html-css	ecm	2.0.13
EditorConfig	Edi	0.17.2
pre-commit-helper	ela	0.5.0
LogFileHighlighter	emi	3.4.0
prettier-vscode	esb	11.0.0
font-switcher	eva	4.1.0
pine-script-syntax-highlighter	ex-	1.0.5
markdown-table-formatter	fcr	3.0.0
file-icons	fil	1.1.0
dependi	fil	0.7.13
vscode-firefox-debug	fir	2.15.0
vscode-hugo-snippets	fiv	0.4.1
shell-format	fox	7.2.5
vscode-hcl-format	fre	1.0.0
copilot	Git	1.304.1517
copilot-chat	Git	0.26.5
remotehub	Git	0.64.0
vscode-github-actions	git	0.27.1
vscode-pull-request-github	Git	0.108.0
go	gol	0.46.1
hcl	has	0.6.0
terraform	has	2.34.3
yaml-plus-json	hil	1.13.0
vscode-remark-hugo	Hit	0.2.13
output-colorizer	IBM	0.1.2
applescript	idl	0.27.0
openvpn	idl	0.3.5
vscode-edit-csv	jan	0.11.3
vscode-codeowners	jas	1.1.1
plantuml	jeb	2.18.1
better-dockerfile-syntax	jef	1.0.2
vscode-peacock	joh	4.2.2
vscode-tsconfig-helper	joh	0.4.3
hugo-shortcode-syntax	kae	2.3.0
hugo-tags-helper	kae	1.2.0
vsc-python-indent	Kev	1.21.0
vscode-markdown-extension	kka	0.0.1
lldb-dap	llv	0.2.11
regexp-preview	Lou	0.1.5
copywithoutcommentscs	Lus	1.0.0
bash-ide-vscode	mad	1.43.0
tmux	mal	0.4.0
json-to-ts	Mar	1.8.0
aws-cli-configure	mar	0.3.0
caddyfile-support	mat	0.4.0
plantumlpreviewer	Meb	0.6.0
rainbow-csv	mec	3.19.0
template-string-converter	meg	0.6.1
workspace-storage-cleanup	meh	1.11.5
python-path	mge	0.0.14
git-graph	mhu	1.30.0
fluent-icons	mig	0.0.19
dotenv	mik	1.0.1
file-downloader	min	1.0.13
prettify-json	moh	0.0.3
vscode-duplicate	mrm	1.2.1
vscode-docker	ms-	1.29.5
playwright	ms-	1.1.13
isort	ms-	2025.0.0
python	ms-	2025.4.0
vscode-pylance	ms-	2025.4.1
datawrangler	ms-	1.20.1
jupyter	ms-	2025.3.0
jupyter-keymap	ms-	1.1.2
remote-ssh	ms-	0.119.0
remote-ssh-edit	ms-	0.87.0
vscode-remote-extensionpack	ms-	0.26.0
cpptools	ms-	1.24.5
live-server	ms-	0.4.15
remote-explorer	ms-	0.4.3
remote-repositories	ms-	0.42.0
remote-server	ms-	1.5.2
vscode-copilot-vision	ms-	0.1.1
vscode-typescript-next	ms-	5.9.20250330
vscode-react-native	msj	1.13.0
npm-outdated	msk	2.2.0
vscode-open-iterm2	mus	0.0.4
color-highlight	nau	2.8.0
gotools	neo	0.1.5
indent-rainbow	ode	8.3.1
actions-to-graph	osc	0.0.2
gitpatch	par	0.2.1
vscode-yaml-sort	Pas	6.6.2
vscode-print	pdc	1.4.0
vscode-versionlens	pfl	1.18.0
gohugo	pho	0.2.0
smart-quotes-normalizer	pin	0.0.2
terraform-advanced-syntax-highlighting	pjm	1.4.3
polacode	pnp	0.3.4
typescript-mono-repo-import-helper	q	0.0.6
text-power-tools	qcz	1.51.0
quicktype	qui	23.0.170
vscode-data-preview	Ran	2.3.0
vscode-xml	red	0.28.1
vscode-yaml	red	1.17.0
vscode-sort-json	ric	1.20.0
inline-parameters-extended	Rob	1.3.3
roo-cline	Roo	3.13.2
terraform-doc-snippets	run	0.6.0
extended-embedded-languages	rus	1.3.0
rust-analyzer	rus	0.3.2379
vs-code-prettier-eslint	rve	6.0.0
jinjahtml	sam	0.20.0
claude-dev	sao	3.13.1
terraform-graph	sar	1.6.0
markdown-preview-enhanced	shd	0.8.18
gitconfig	sid	2.0.1
just	ske	2.0.0
autoimport	ste	1.5.4
code-spell-checker	str	4.0.47
svelte-vscode	sve	109.5.4
ignore	Syl	0.0.7
even-better-toml	tam	0.21.2
ollama-modelfile	Tan	1.6.0
vscode-readme-pattern	tho	1.3.0
shellcheck	tim	0.37.7
pdf	tom	1.2.2
cron-explained	tum	1.3.1
pypi-assistant	twi	2.2.0
terraform-link-docs	Tyl	0.2.0
vscode-mdx	uni	1.8.14
errorlens	use	3.25.0
intellicode-api-usage-examples	Vis	0.2.9
vscodeintellicode	Vis	1.3.2
clipimage64	Voy	1.0.6
vscode-icons	vsc	12.12.0
vscode-ollama-modelfile	war	1.0.1
vscode-todo-highlight	way	1.0.5
jinja	who	0.0.8
viml	Xad	2.2.0
pretty-ts-errors	Yoa	0.6.1
markdown-all-in-one	yzh	3.6.3
json	Zai	2.0.2

(3 theme extensions excluded)

[sammcj]

Found a workaround - delete ~/Library/Application\ Support/Code/Service\ Worker

[Kavakuo]

I had the same problem on Linux. Deleting ~/.config/Code/Service Worker/ helped.

[alxiord]

I had the same problem on Linux. Deleting ~/.config/Code/Service Worker/ helped.

For anyone encountering the same issue on Windows, the corresponding dir is %APPDATA%\Code\Service Worker\ and deleting it works

[ArthurLobopro]

Any prevision to fix it?

[Keavon]

On my end, this broke itself about a year ago, and then fixed itself within a few weeks after that point. It has now returned again 1-2 weeks ago and has been quite a nuisance, constantly having to restart VS Code for the Git Graph extension to open. Does anyone else have similar anecdotal experiences that might line up into forming a clearer picture of what has broken?

[calloftimereiver]

I had the same problem on Linux. Deleting ~/.config/Code/Service Worker/ helped.

For anyone encountering the same issue on Windows, the corresponding dir is %APPDATA%\Code\Service Worker\ and deleting it works

Thank u， it works for me

[davidAtInleague]

I get this basically every odd (as in 2n+1) time I open vscode and try to load the mhutchie gitgraph view.

[joellutz]

I only ever have this issue when opening a second vscode instance. In the first folder I open in vscode, I can view my markdown preview or gitgraph just fine. When opening a second folder in a new vscode instance, opening takes significantly longer and the error message appears when trying to view markdown preview or gitgraph.

[BasilaryGroup]

I'm see this problem with running vs code on WSL 2.0 with devcontainer. It started a few weeks ago. Sometimes the suggested work arounds do not work. Annoying.

Version: 1.104.2 (system setup)
Commit: e3a5acf
Date: 2025-09-24T11:21:37.073Z
Electron: 37.3.1
ElectronBuildId: 12404162
Chromium: 138.0.7204.235
Node.js: 22.18.0
V8: 13.8.258.31-electron.0
OS: Windows_NT x64 10.0.26100

My %APPDATA%\Code\Service Worker\ folder was 149 MB with content dating back to 2023. Was it too large? Too much obsolete data?

The problem appears with and without extensions installed. I verified the Windows 11 webview installation was current and valid.

[erbanku]

Happening a few times a day, even after deleting the folder above, any fix for this?

[calloftimereiver]

Happening a few times a day, even after deleting the folder above, any fix for this?

The issue recently recurred on my environment, and the resolution involved performing another deletion process.

[Glifaus]

It's happening to me also in latest version:
Version: 1.106.1 (user setup)
Commit: cb1933b
Date: 2025-11-16T10:20:23.745Z
Electron: 37.7.0
ElectronBuildId: 12781156
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26100