A traceback is not the problem. It's the first clue. Four questions you ask every time, tried on real tracebacks that try to mislead you: errors in one file caused by another, errors deep inside Python's own code, two tracebacks in one message, and syntax errors that point to the wrong line.
A bare except hides typos and real bugs behind wrong results. Catch the specific error you expect, keep the try block small, and let everything else crash where you can see it.
Python is probably installed. Your terminal just can't find it. Check the three possible causes in order, fix the right one on Windows, Mac or Linux, and confirm which Python you're really running.
console.log is the fastest way to see what your code is doing, until it prints 300 lines and you can't find the one that matters. Label your logs, log objects properly, use console.table and console.group, and clean up before you ship.
"Uncaught TypeError: Cannot read properties of undefined" means you used a value that wasn't there. Read the message, find the line, check what is actually undefined, then fix the cause instead of hiding it.
Your HTML file opens blank, shows as text, or downloads instead of rendering. Check the extension, the file:// open path, the doctype and a missing closing tag before you rewrite the page.
Trace a reproducible colour and spacing conflict from the rendered result to the winning rule, then verify the repair in the source file.
Install the Node types, turn them on in tsconfig.json, and switch require to import. Also covers the other causes of the same error: a typo, a missing import and a missing lib.
Read an error in three passes and match the eight most common phrases to their causes, using real tsc output. After this, a wall of errors is a list you can work through.
Let a declared return type find a branch with no return, an arrow function with braces, and an async function typed wrong. After this, a function cannot quietly give back undefined.
Count what each strict flag costs, turn them on one at a time, park one stubborn error with ts-expect-error, and finish with strict true. After this, an old project can move to strict in steps.
Find the cause of the column does not exist error from the five usual ones: a typo, double quotes, an alias in WHERE, a quoted name and a missing table. After this, you can fix it in a minute instead of changing the table.