It said "Failed to load mods: Error in assignID: entity with name 'sp-1-5d-solar panel-02' does not exist

Source: sp-1-ultimate solar (solar-panel).

maybe it crashes with other mods?

What are your version of the mods for Solar Prod and 5Dims? Have you updated any of those? Can you provide a save

it used to work well until I update mods
here's the log https://1drv.ms/f/c/e1120e79b63ebbbb/Eru7PrZ5DhIggOEJYQEAAAABBzvaoO0t1FRI3_XA3wqDjw?e=JmH6N6
All mods are at the latest version.

Same here:
Fehler beim Laden der Mods: Error in assignID: entity with name 'sp-1-alien-solarpanel' does not exist.
Source: sp-1-solar-panel (solar-panel).

Seems to have problems with other mods adding solarpanels, like the Aliensolarpanel from "Alien Loot Economy".
Version 2.0.3 works fine

This was simply because 5Dims and AlineLoot were not compatible yet, fixed with new release sorry