The usePersonAvatarUpload hook was passing the core Apollo client (pointing to /graphql) to useUploadFilesFieldFileMutation, but the uploadFilesFieldFile mutation is registered on the metadata schema (/metadata). This caused "Cannot query field 'uploadFilesFieldFile' on type 'Mutation'" errors. Remove the explicit core client override so the mutation uses the default metadata client, matching how useUploadImageMutation already works in the same hook. Co-Authored-By: Claude Opus 4.6 <[email protected]>