Hello @Brizzer! 👋
I'm sorry that you ran into an error on your Mac. 1Password 8 doesn't include an integration with LaunchBar and to prevent the error that you mentioned above from occurring you'll need to disable 1Password integration in LaunchBar's preferences. This comment from another user might help: https://1password.community/discussion/comment/645548/#Comment_645548
Our founder Dave wrote about the exciting new opportunities for third-party integrations with 1Password 8 here: Early access and Alfred / Spotlight / LaunchBar (3rd party search integration) - Page 4 — 1Password Support Community
I suggest reaching out to the developer of LaunchBar to let them know that integration with 1Password 8 is something that you'd like to see. 🙂