Error 264 refers to the same account launching an experience from a different device. Check your own sessions first, then secure the account if the other login is unfamiliar.
Before you start
Use the official Roblox account and keep passwords, one-time codes, gift-card PINs, and full payment details off third-party sites.
What to check, in order
- 1
Close Roblox on devices you own and try joining again on one device.
- 2
Review Where you're logged in under Security and end an unfamiliar session.
- 3
If you don't recognize the activity, change the password and enable two-step verification before retrying.
One important limit
Do not assume a second session is harmless if it is not yours.
Continue on an official screen
Use the linked Roblox or payment-provider page to confirm the current options. If you contact support, describe what happened and the checks you have already tried.
Official sources and scope
Reviewed on November 3, 2026. Roblox features can vary by account, age, region, platform, and current policy. Follow the linked official screen when it differs from this guide.