On a fresh install on a MacBook Air M1 after enabling sync and choosing a remote vault Obsidian fails to sync. Console: WebSocket connection to 'wss://sync-11.obsidian.md/' failed. All other network connections work fine, but WebSocket connections appear to fail consistently. Every other device works.
(Obsidian version 1.6.7, most recent MacOS, no network proxy, no VPN, firewall disabled)
Does it work from you phone with data?
Does it work if you connect drom another network?
Yes, that’s what I meant with “every other device works” (two iOS devices, one MacOS device).
Switching networks did not help.
I’ve also tried both to sync from scratch and after transferring the vault over from my iPad.
The Macbook is configured with out-of-the box defaults with respect to all networking. Nothing installed there that might intercept, neither.
where did you write that all other devices work?
Anyway, if it works on other devices and not that one. It must be something limiting networking on that device. Either on the device itself or the router it is attached to.
Initial post 
Can’t be the router: other devices on the same network are syncing fine.
Ok I must be blind.
Kindly on the mac that doesn’t work, provide the debugging info
Command “Show Debug Info”.
SYSTEM INFO:
Obsidian version: v1.6.7
Installer version: v1.6.7
Operating system: Darwin Kernel Version 23.5.0: Wed May 1 20:16:51 PDT 2024; root:xnu-10063.121.3~5/RELEASE_ARM64_T8103 23.5.0
Login status: logged in
Catalyst license: insider
Insider build toggle: on
Live preview: on
Base theme: adapt to system
Community theme: AnuPpuccin v1.5.0
Snippets enabled: 20
Restricted mode: off
Plugins installed: 170
Plugins enabled: 80
1: Templater v2.4.1
2: Advanced URI v1.41.0
3: Periodic Notes v0.0.17
4: Zoom v1.1.2
5: Datetime Language Changer v1.0.2
6: Minimal Theme Settings v8.0.2
7: Dataview v0.5.67
8: AI for Templater v1.0.9
9: Plugin Manager v0.1.6
10: Kanban v2.0.51
11: Style Settings v1.0.8
12: Actions URI v1.6.1
13: Blockier v1.1.0
14: Colored Tags Wrangler v1.0.0-BETA-002
15: Contextual Typography v2.2.5
16: Grappling Hook v1.2.3
17: HelpMate v1.0.6
18: Jump-to-Date v1.0.16
19: Links v1.17.12
20: Mononote v1.2.2
21: Outliner v4.8.1
22: Strange New Worlds v2.1.4
23: Text Generator v0.7.28
24: Text Transporter v1.0.11
25: Shortcut Launcher v1.1.0
26: Settings profiles v0.5.7
27: Select current line v1.0.0
28: Persistent Links v0.2.0
29: Pane Relief v0.5.3
30: Media Notes v1.2.0
31: Media Extended v3.2.4
32: Auto Link Title v1.5.4
33: BRAT v1.0.1
34: Consistent Attachments and Links v2.0.0
35: Date Inserter v0.3.3
36: Hotkey Helper v0.3.18
37: Linter v1.25.0
38: Modal forms v1.50.0
39: Natural Language Dates v0.6.2
40: Note aliases v1.2.0
41: Outline Converter v1.3.0
42: People Link v1.0.2
43: Podcast Note v1.3.2
44: PodNotes v2.13.0
45: QuickAdd v1.11.0
46: Sort & Permute lines v0.7.0
47: Tag Summary v2.1.5
48: Task Status v1.2.0
49: Text Conversions v1.0.0
50: Text Focus v1.0.0
51: Youtube Summarizer v1.0.2
52: YouTube Template v1.1.8
53: YTranscript v0.9.2
54: Change Case v2.0.67
55: Editor Syntax Highlight v0.1.3
56: Lumberjack 
v1.3.0
57: Paste URL into selection v1.7.0
58: Calendar v1.5.10
59: Better Search Views v0.2.2
60: Tasks v7.6.1
61: Todoist Link v2.2.0
62: Colorful Tag v1.3.2
63: Book Search v0.7.4
64: Feeds v0.0.9
65: List Outline Helper v1.0.7
66: Novel word count v3.10.2
67: Obsidian shared to Notion v0.7.6
68: Tag Wrangler v0.6.1
69: ICS v1.6.6
70: Day Planner v0.21.1
71: Link with alias v1.0.8
72: Recent Files v1.4.1
73: CFRCopilot v2.5.4
74: Divide & Conquer v1.0.0
75: Importer v1.6.4
76: Link Converter v0.1.6
77: Raindrop Highlights v0.0.22
78: Readwise Official v2.0.1
79: AI Research Assistant v1.7.0
80: Smart Connections v2.1.86
(I already tried with community plugins off, as well – same issue)
You can try with restricted mode on and restart Obsidian.
However, I still think it’s your mac that is configured to block websockets from Obsidian.
Already did so.
Given that the Mac has a totally vanilla configuration I have absolutely no clue why it should block websockets from Obsidian. Suspected the firewall but that’s disabled.
is this home or is this a business computer?
Solved. 
For whatever reason there had been a https proxy configured. (My partner’s machine – I never had set this up and she never touches system settings. Weird.)
Thanks for your time!
For future people encountering the same error when connected using work VPN
See also Obsidian Sync: Error Unable to connect to server [continuation] - #4 by WhiteNoise
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