How do I fix invalid authenticity token?

Could you please elaborate on the issue you're facing with an invalid authenticity token? Are you encountering this error while trying to access a specific cryptocurrency exchange or wallet service? Typically, this error occurs due to security measures in place to prevent unauthorized access. Have you tried refreshing the page or clearing your browser's cache and cookies? If not, could you please give that a shot and see if it resolves the issue? Additionally, make sure you're using a secure and trusted connection, as some networks might be compromised or insecure. Let me know if you're still facing difficulties, and I'll be happy to assist you further.