ERROR: Material doesn't have a color property '_emission'

Hello,

Could anyone please tell me more about this error message i am getting when i import some assets and also how can i solve it ??

Thanks in advance.

In the material property emission is on and in the object in which the material is applied has the Light map static option is off. then this error will come.

In the corresponding object, Turn on the Light map static under Mesh render er will resolve this and you will get nice object illuminated lighting.