nRF Mesh STATIC_ASSERT(sizeof(timer_node_t) == APP_TIMER_NODE_SIZE) unspecified message

Good day!

Started to work with nRF mesh. And wanted to add ir_lib from this project to Generic OnOff example.

And Source navigator shows error: static_assert failed "unspecified message" on this line STATIC_ASSERT(sizeof(timer_node_t) == APP_TIMER_NODE_SIZE).

What does it mean? And what to do with this?

Linux, SES, gcc compiler.

Updated: Ok, I've been little bit confused now. Projects build after transfering functions from sources to main.c