Welcome to the Arduino fora.
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How to use this forum
Please post your code as per the instructions. Please don't post images of text, that's just daft.
Please also post a schematic, hand drawn and photographed is fine.
Support for Nextion on these fora is pretty much as follows:
You can follow the methods I set out in using Nextion displays with Arduino. My methods do not use the Nextion libraries, so while I am happy to offer help on using my methods I cannot offer anything very helpful for any Nextion library.
The original Nextion libraries are full of bugs. There is a link from my tutorial to some improved Nextion libraries created by Ray Livingston, I suggest those might be worth trying if you prefer to use a library.
There's also a separate Easy Nextion Library by Seithan, his methods are different to mine, choose which works best for you.
Beyond that the odd person occasionally offers a bit of help but not much.