1# C3 Troubleshooting
2 
3## Deployment Issues
4 
5### Placeholder IDs
6 
7**Error:** "Invalid namespace ID"  
8**Fix:** Replace placeholders in wrangler.jsonc with real IDs:
9```bash
10npx wrangler kv namespace create MY_KV  # Get real ID
11```
12 
13### Authentication
14 
15**Error:** "Not authenticated"  
16**Fix:** `npx wrangler login` or set `CLOUDFLARE_API_TOKEN`
17 
18### Name Conflict
19 
20**Error:** "Worker already exists"  
21**Fix:** Change `name` in wrangler.jsonc
22 
23## Platform Selection
24 
25| Need | Platform |
26|------|----------|
27| Git integration, branch previews | `--platform=pages` |
28| Durable Objects, D1, Queues | Workers (default) |
29 
30Wrong platform? Recreate with correct `--platform` flag.
31 
32## TypeScript Issues
33 
34**"Cannot find name 'KVNamespace'"**
35```bash
36npm run cf-typegen  # Regenerate types
37# Restart TS server in editor
38```
39 
40**Missing types after config change:** Re-run `npm run cf-typegen`
41 
42## Package Manager
43 
44**Multiple lockfiles causing issues:**
45```bash
46rm pnpm-lock.yaml  # If using npm
47rm package-lock.json  # If using pnpm
48```
49 
50## CI/CD
51 
52**CI hangs on prompts:**
53```bash
54npm create cloudflare@latest my-app -- \
55  --type=hello-world --lang=ts --no-git --no-deploy
56```
57 
58**Auth in CI:**
59```yaml
60env:
61  CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN }}
62  CLOUDFLARE_ACCOUNT_ID: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
63```
64 
65## Framework-Specific
66 
67| Framework | Issue | Fix |
68|-----------|-------|-----|
69| Next.js | create-next-app failed | `npm cache clean --force`, retry |
70| Astro | Adapter missing | Install `@astrojs/cloudflare` |
71| Remix | Module errors | Update `@remix-run/cloudflare*` |
72 
73## Compatibility Date
74 
75**"Feature X requires compatibility_date >= ..."**  
76**Fix:** Update `compatibility_date` in wrangler.jsonc to today's date
77 
78## Node.js Version
79 
80**"Node.js version not supported"**  
81**Fix:** Install Node.js 18+ (`nvm install 20`)
82 
83## Quick Reference
84 
85| Error | Cause | Fix |
86|-------|-------|-----|
87| Invalid namespace ID | Placeholder binding | Create resource, update config |
88| Not authenticated | No login | `npx wrangler login` |
89| Cannot find KVNamespace | Missing types | `npm run cf-typegen` |
90| Worker already exists | Name conflict | Change `name` |
91| CI hangs | Missing flags | Add --type, --lang, --no-deploy |
92| Template not found | Bad name | Check cloudflare/templates |
93