run into a roadblock

Translations
сталкиваться с препятствием
During the project, we suddenly ran into a roadblock that delayed our progress.
Во время проекта мы внезапно столкнулись с препятствием, которое задержало наш прогресс.
Definitions
To encounter an unexpected obstacle or difficulty that prevents progress or makes it harder to continue with a task or plan.