# What should I check when sign-in or license validation fails?

> Confirm your Copilink email and password, internet connection, system clock, subscription or trial state, and machine allowance. Retry once, refresh access from Account & License, then use the dashboard or contact support if access remains expired, revoked, or over its device limit.

Last verified: 2026-09-14
Canonical page: https://copilink.com/standalone/faq/troubleshooting-and-safety/what-should-i-check-when-sign-in-or-license-validation-fails
Product: Copilink Standalone
Markdown of: https://copilink.com/standalone/faq/troubleshooting-and-safety/what-should-i-check-when-sign-in-or-license-validation-fails


## Answer

Confirm your Copilink email and password, internet connection, system clock, subscription or trial state, and machine allowance. Retry once, refresh access from Account & License, then use the dashboard or contact support if access remains expired, revoked, or over its device limit.

## More Copilink help

- [Troubleshooting and safety FAQ](https://copilink.com/standalone/faq/troubleshooting-and-safety)
- [Copilink Standalone user guide](https://copilink.com/standalone/user-guide)

## Source

- https://copilink.com/standalone/faq/troubleshooting-and-safety/what-should-i-check-when-sign-in-or-license-validation-fails