Error: opening repo: opendir(objects): No such file or directory

Hello, im trying to install bottles using flatpak-builder --repo=bottles --force-clean --user build-dir com.usebottles.bottles.yml command, and then i got this error

Exporting com.usebottles.bottles to repo
error: opening repo: opendir(objects): No such file or directory
Export failed: Child process exited with code 1

can someone guide me? i also already add flatpak repo using: sudo flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo