Nextion Bridge problem

Hello.
I come to ask you from the community, I've tried everything but I can't use Nextion through the Arduino.

I have two Sketch,

A Sketch is the 12 buttons and the 3 encoders, code generated by Simhub.

The second Sketch is the nextion bridge example, which comes bundled with Simhub.

Programs work perfectly when loaded separately.

My great difficulty is to join the two Sketch, to work the buttons and encoders together with Nextion.

I am uploading both programs, can you merge them?

https://drive.google.com/file/d/13xphSuyR4x_7O_kqyOyMqgekEFLa1q6z/view?usp=sharing