Error d8 failed

[ABG]

See

Your build failed due an error in the DX stage, not because of an error in your program

Warning! This project has massive violations of the Don't Repeat Yourself rule. Learn tables procedures and parameters generic (any) blocks data storage and access

Regarding your hundreds of check boxes, also see

Ideas for App Inventor 2 Anti-Awards

The Just One More Anti-Award For the person who overstuffed his app, one item at a time, until AI2 could not handle more. [Monty Python's The Meaning of Life: Mr. Creosote underestimates his stomach (HD CLIP)]