The issue is a corruption on the drive you are using (as the warning is indicating), the log has those SQUASHFS error: squashfs_read_data failed to read block 0x1cdf4bd9
Closing, it's not a software bug, you should probably try with another USB stick ** Changed in: ubiquity (Ubuntu) Importance: Undecided => Low ** Changed in: ubiquity (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1818062 Title: New USB installation media created with mkusb, first installation done with this usb disk. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1818062/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs