Trying to copy an LSTM code, giving me an error "x and y must have same first dimension, but have shapes (1103,) and (275,)"

Question

I'm trying to copy a LSTM model that I found from here: Stock Market-Predict volume with LSTM model

I'm getting stuck on the last line of code. Specifically, this is what it tells me:

Picture of code

I literally know next to nothing about code just basic python.

If you want to, I can add you to like the google drive collaboratory so you could look at the whole code.