---
title: Troubleshooting
description: Common issues and solutions
---

## Database Connection Failed

```bash
# Check database is running
docker compose ps db

# Test connection
docker compose exec db psql -U postgres -c "SELECT 1"
```

Verify `DATABASE_URL` format: `postgresql://user:pass@host:5432/database`

## Ollama Models Not Showing

Inside Docker, `localhost` = the container, not your host machine.

```bash
# For host-machine Ollama, use:
OLLAMA_URL=http://host.docker.internal:11434  # macOS/Windows
OLLAMA_URL=http://192.168.1.x:11434           # Linux (use actual IP)
```

## WebSocket/Realtime Not Working

1. Check `NEXT_PUBLIC_SOCKET_URL` matches your domain
2. Verify realtime service is running: `docker compose ps realtime`
3. Ensure reverse proxy passes WebSocket upgrades (see [Docker guide](/self-hosting/docker))

## 502 Bad Gateway

```bash
# Check app is running
docker compose ps simstudio
docker compose logs simstudio

# Common causes: out of memory, database not ready
```

## Migration Errors

```bash
# View migration logs
docker compose logs migrations

# Run manually
docker compose exec simstudio bun run db:migrate
```

## pgvector Not Found

Use the correct PostgreSQL image:
```yaml
image: pgvector/pgvector:pg17  # NOT postgres:17
```

## Certificate Errors (CERT_HAS_EXPIRED)

If you see SSL certificate errors when calling external APIs:

```bash
# Update CA certificates in container
docker compose exec simstudio apt-get update && apt-get install -y ca-certificates

# Or set in environment (not recommended for production)
NODE_TLS_REJECT_UNAUTHORIZED=0
```

## Blank Page After Login

1. Check browser console for errors
2. Verify `NEXT_PUBLIC_APP_URL` matches your actual domain
3. Clear browser cookies and local storage
4. Check that all services are running: `docker compose ps`

## Windows-Specific Issues

**Turbopack errors on Windows:**
```bash
# Use WSL2 for better compatibility
wsl --install

# Or disable Turbopack in package.json
# Change "next dev --turbopack" to "next dev"
```

**Line ending issues:**
```bash
# Configure git to use LF
git config --global core.autocrlf input
```

## View Logs

```bash
# All services
docker compose logs -f

# Specific service
docker compose logs -f simstudio
```

## Getting Help

- [GitHub Issues](https://github.com/simstudioai/sim/issues)
- [Discord](https://discord.gg/Hr4UWYEcTT)
