Fluid Simulation Particles invisible after re-opening the project?

Hello there,

i followed a YouTube-Tutorial for a particle fluid simulation. After baking the simulation, i started rendering but i unfortunately had to stop and re-open the project. Now the particles aren’t visible anymore and even in the render nothing is visible and/or moves.

How it started (left) and how it looks now (right):

Let’s check a few things:

-Did you move the project files? That could cause a baked simulation to be lost.
-When baking the simulation, did you actually press the bake button, or did you just let the simulation play in the viewport? when playing a sim in the viewport, you only get a temporary preview.

If these are not in cause, then we could better tell the problem by looking at your simulation’s settings, especially the cache settings.