FTB App common issues
Solutions for common issues that can occur during the use of the FTB App.
FTB-AUTH Errors
| Code | Error | Solution |
|---|---|---|
| 000001 | Failed to authenticate with Xbox Live | Microsoft/Xbox issue. |
| 000002 | Failed to authenticate with Xbox Secure Token Service (XSTS) | Microsoft/Xbox issue. |
| 000003 | Failed to login with Xbox | Microsoft/Xbox issue. |
| 000004 | Unable to verify account entitlements | You've likely logged in with the wrong account. |
| 000005 | Failed to find user's Minecraft profile | Launch Minecraft: Java Edition in the vanilla launcher at least once. |
| 000006 | Account does not own Minecraft | Verify you are logging in with the right Microsoft account. If the account absolutely owns Minecraft, try deleting profiles.json file in the FTB App folder. |
| 000012 | Account does not have an Xbox Live account | Microsoft set a deadline of Sept. 19th, 2023 for all Mojang accounts to migrate to Microsoft accounts. If you didn't migrate you no longer own Minecraft. |
| 000013 | Account is from a region that does not support Xbox Live | Create an Xbox account in a region supported by Xbox Live. |
| 000014 | Account needs adult verification from Xbox | Have an adult in your Xbox Family allow your access. |
| 000015 | Account is under 18 | You must be 18 or have adult consent to use the FTB App. |
| 000016 | Account has been rejected by Xbox Live services for an unknown reason | Unknown error. |
The FTB App says I don't own Minecraft
Make sure you own Minecraft on a Microsoft account. If you bought Minecraft when it was still using Mojang accounts, there was a deadline on Sept. 19th, 2023 to migrate to a Microsoft account. If you did not migrate, you do not own Minecraft anymore and will be unable to login with your Mojang credentials. Microsoft did send out a mercy email on that day which will allow anyone that didn't meet the deadline to get a new Minecraft account attached to their Microsoft account, up to 90 days from the deadline.
An error occurred whilst launching... Failed to execute asset update task
Check the latest.log file in the FTB App folder for lines that say:
Tried URL: 'https://resources.download.minecraft.net/blah/blahblahblah...'
Take note specifically of the /blah/blahblahblah part, and if you have multiple Tried URL lines only pay attention ones with unique blah/blahblahblah portions. It is a vanilla Minecraft file that the launcher requires:
-
In File Explorer navigate to
C:/Users/<your_username>/AppData/Local/.ftba/bin/assets/objectsand find the folder with the firstblahin the URL (if the URL ended in/e8/e8fddnjabdsffind thee8folder and then the file callede8fddnjabdsf). -
Delete this file and relaunch the FTB App.
Trying to sign in through Microsoft is giving me "We can't find the FTB App"
Using Brave or Safari browsers often cause issues signing into the FTB App. Try disabling Brave Shield or use a different browser. Copy the URL at the top and paste it into another browser of your choice.
Caused by: java.security.cert.CertificateNotYetValidException in debug.log
Your computer's date and time are set incorrectly. Allow Windows to set it automatically for you.
Haven't found your issue?
Take a look at the general modded Minecraft errors that are not specific to the FTB App.