run into a wall

Translations
натолкнуться на стену (в переносном смысле)
The project ran into a wall when we lost funding.
Проект натолкнулся на стену, когда мы потеряли финансирование.
Definitions
To encounter an obstacle or difficulty that prevents further progress, either literally (hitting a physical wall) or figuratively (facing a problem that is hard to overcome).