I have material which is attached to my object and it is seen normally when i am in object mode/mateiral
But when i go into render mode i get object without material:

As you can see also in material preview it is gray.
It is cycles render.
I have material which is attached to my object and it is seen normally when i am in object mode/mateiral
But when i go into render mode i get object without material:

As you can see also in material preview it is gray.
It is cycles render.
You can't use a mix shader node to mix RGB (image or texture) information.
Use a Color>MixRGB node instead.
You shouldn't mix data types when connecting nodes. Green goes with green, yellow with yellow and so on.
read:
What is the meaning of the color of the node sockets in the node editor?
and
Cycles - (Shader) Nodes - inputs outputs - What are the exact data types?
and
https://docs.blender.org/manual/en/dev/editors/node_editor/nodes/parts.html