ARK server not starting or crashing: what to do

ARK is heavy: loading the map takes several minutes, more with mods. A crash loop is usually caused by low RAM or an incompatible mod.

1. Allow 5 to 10 minutes for the first startup, with the console open.

2. Remove the last mod you added ("Steam Workshop" window) and restart to test.

3. RAM maxed out: service page, My plan section (Overview tab).

4. Still stuck: open a ticket with the last few lines of the console.