Hi @Dmitry_Regent,
Sharing solution code publicly is prohibited in the community. I have removed it.
As for the code you shared, you took the expressions as it is and implemented them. Those were shown to you as an example and are not the complete equations. You have to add in the rest.
Below the 4.4 section is the complete equation. What we shared and you copy/pasted is only half of the equation.
Best,
Mubsi