How recent is your Trellis version?
It might be fastest to back up your database and uploads and try reprovisioning your server with a fresh copy of Trellis (and all your configs, of course).
Here’s a quick overview of how I update Trellis. There are better ways but this is fast:
Copy the following out of your Trellis directory:
.vault_pass
ansible.cfg
/group_vars
/deploy-hooks
/hosts
/nginx-includes
Delete everything in your Trellis directory
Clone Trellis from source into your Trellis directory
Copy back in and overwrite the following:
.vault_pass
ansible.cfg
/group_vars/development
/group_vars/staging
/group_vars/production
/group_vars/all/mail.yml
/group_vars/all/vault.yml
/deploy-hooks
/hosts
Then back up your database and uploads again!!! and rebuild and reprovision your server.