Troubleshooting of Claude: Difference between revisions

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'''Suggested Workaround:'''

* Disable ad-blocking browser extensions (e.g. uBlock Origin) before signing in. These extensions can interfere with the OAuth authentication flow, causing the browser redirect to hang indefinitely.

* Disable ad-blocking browser extensions (e.g. [https://ublockorigin.com/ uBlock Origin]) before signing in. These extensions can interfere with the OAuth authentication flow, causing the browser redirect to hang indefinitely.

=== How to fix "stop_reason": "refusal" in Claude API ===

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# Go back to your Workspaces overview, then click the menu icon (three dots) beside your workspace name and select "Manage API Keys"

# Access the "Limits" tab and configure your monthly spending cap (Monthly limit)

=== Fixing "Unknown OAuth client" When Connecting Notion MCP in Claude Code ===

'''Affected Version''': Claude Code 2.1.80+

'''Workaround:'''

If you encounter this error while connecting Notion MCP, try removing the existing HTTP transport installation and reinstalling it via `mcp-remote`:

<pre>bash

# Remove existing Notion MCP (if installed)

claude mcp remove notion

# Reinstall using mcp-remote

claude mcp add notion npx -- -y mcp-remote https://mcp.notion.com/mcp

</pre>

For a detailed step-by-step guide with screenshots, see: [https://errerrors.blogspot.com/2026/04/fixing-unknown-oauth-client-error-when.html Fixing "Unknown OAuth client" Error When Connecting Notion MCP in Claude Code] (written primarily in Traditional Chinese)

=== How to Fix Missing Markdown Copy and Download Options in Claude Web Artifacts ===

'''Error Details'''

Artifacts created in the Claude web app cannot directly copy or download the original Markdown or Mermaid source. The Artifact menu does not provide '''Copy''', '''Source''', '''Code''', or '''Download''' options.

'''Affected Scope'''

Artifacts created through the Claude web app.

'''Suggestions'''

# Paste the Artifact content directly into the conversation and ask Claude to reproduce it as raw Markdown.

# Alternatively, ask Claude to generate a downloadable <code>.md</code> file.

'''Possible Root Cause'''

Claude recently unified Chat, Cowork, Artifacts, Docs, and Slides under a redesigned interface. The source-copying and downloading features may not have been migrated to the new web interface yet, or the current interface may prioritize collaboration, sharing, and canvas-based editing.

'''References''':

# [https://support.claude.com/en/articles/9547008-publishing-remixing-and-sharing-artifacts Claude Help Center: Publish and share artifacts]

# [https://claude.com/features/artifacts Claude: Artifacts]

# [https://www.reuters.com/business/media-telecom/anthropic-fold-claude-ai-features-into-one-interface-launches-document-tools-2026-09-16/ Reuters: Anthropic unifies Claude features and launches document tools]

== Further reading ==

@@ Line 9: / Line 9: @@
 '''Suggested Workaround:'''
-* Disable ad-blocking browser extensions (e.g. uBlock Origin) before signing in. These extensions can interfere with the OAuth authentication flow, causing the browser redirect to hang indefinitely.
+* Disable ad-blocking browser extensions (e.g. [https://ublockorigin.com/ uBlock Origin]) before signing in. These extensions can interfere with the OAuth authentication flow, causing the browser redirect to hang indefinitely.
 === How to fix "stop_reason": "refusal" in Claude API ===
@@ Line 125: / Line 124: @@
 # Go back to your Workspaces overview, then click the menu icon (three dots) beside your workspace name and select "Manage API Keys"
 # Access the "Limits" tab and configure your monthly spending cap (Monthly limit)
+=== Fixing "Unknown OAuth client" When Connecting Notion MCP in Claude Code ===
+'''Affected Version''': Claude Code 2.1.80+
+'''Workaround:'''
+If you encounter this error while connecting Notion MCP, try removing the existing HTTP transport installation and reinstalling it via `mcp-remote`:
+<pre>bash
+# Remove existing Notion MCP (if installed)
+claude mcp remove notion
+# Reinstall using mcp-remote
+claude mcp add notion npx -- -y mcp-remote https://mcp.notion.com/mcp
+</pre>
+For a detailed step-by-step guide with screenshots, see: [https://errerrors.blogspot.com/2026/04/fixing-unknown-oauth-client-error-when.html Fixing "Unknown OAuth client" Error When Connecting Notion MCP in Claude Code] (written primarily in Traditional Chinese)
+=== How to Fix Missing Markdown Copy and Download Options in Claude Web Artifacts ===
+'''Error Details'''
+Artifacts created in the Claude web app cannot directly copy or download the original Markdown or Mermaid source. The Artifact menu does not provide '''Copy''', '''Source''', '''Code''', or '''Download''' options.
+'''Affected Scope'''
+Artifacts created through the Claude web app.
+'''Suggestions'''
+# Paste the Artifact content directly into the conversation and ask Claude to reproduce it as raw Markdown.
+# Alternatively, ask Claude to generate a downloadable <code>.md</code> file.
+'''Possible Root Cause'''
+Claude recently unified Chat, Cowork, Artifacts, Docs, and Slides under a redesigned interface. The source-copying and downloading features may not have been migrated to the new web interface yet, or the current interface may prioritize collaboration, sharing, and canvas-based editing.
+'''References''':
+# [https://support.claude.com/en/articles/9547008-publishing-remixing-and-sharing-artifacts Claude Help Center: Publish and share artifacts]
+# [https://claude.com/features/artifacts Claude: Artifacts]
+# [https://www.reuters.com/business/media-telecom/anthropic-fold-claude-ai-features-into-one-interface-launches-document-tools-2026-09-16/ Reuters: Anthropic unifies Claude features and launches document tools]
 == Further reading ==