What if the star Stellaris cannot colonize? What if they can't find a solution?

First you have to learn the skills of immigration, and then you can build a colonial spaceship on the space station. Then, your ethnic characteristics, such as continental climate, you want to find out whether the planet of immigrants has a maritime climate or a polar climate. You can't immigrate without learning the corresponding immigration skills. If they are all on the same line, just point the immigrant ship to the corresponding planet, or point to the planet to colonize, and choose the landing location.