Troubleshooting

Solutions to common issues across all Krantz products.

Login Issues

“Invalid credentials” on login

• Verify username and password
• Check Caps Lock

“Device limit reached”

• Revoke an old device from Account tab
• Try logging in again

“License expired”

• Renew your subscription
• Grace period allows limited functionality for 3 days

Checking Issues

High rate of “Connection Failed”

Causes:

• Poor internet connection
• Proxies not working
• Too many threads

Solutions:

• Test internet connection
• Verify proxies work
• Reduce thread count
• Try without proxies first

Many “Rate Limited” results

Causes:

• Too many requests too fast
• Proxies flagged/blocked

Solutions:

• Reduce thread count
• Use more/better proxies
• Try residential proxies

“Server Not Found” errors

Causes:

• Domain doesn’t exist
• No mail server configured

Solutions:

• Verify domain is valid
• Check if the domain has active mail service

Slow checking speed

Causes:

• Low thread count
• Slow proxies

Solutions:

• Increase threads (if plan allows)
• Use faster proxies
• Check proxy latency

Proxy Issues

“Proxy Error” on all checks

• Verify proxy format is correct
• Test proxies manually
• Check proxy authentication
• Try different proxy provider

Proxies working but rate limited

• Proxies may be flagged
• Try residential proxies
• Reduce requests per IP

Application Issues

App won’t start

• Windows: Install Visual C++ Redistributable
• Check antivirus exclusions
• Reinstall application

Crashes during checking

• Reduce thread count
• Check system resources

Settings not saving

• Run as administrator (Windows)
• Check disk space

Getting Help

If issues persist, contact support with:

• Application version
• Operating system
• Steps to reproduce
• Error messages