Why is there a 500 error in yii2?

Question

Yii

Welcome all! I decided to study vagrant and raised a yii2 project on it, everything worked well, but suddenly a 500 error began to appear and I can’t understand the reason. I demolished the vagrant with the vagrant destroy command and reinstalled vagrant up, but still the error 500. Please help me understand the cause of this error and how to fix it.

Answer 1

http logs are viewed from the server, then from php.
we also look at the logs from the application runtime/log/app.log.
we also take each query to the database and analyze through explain for sure there is no index on a large table.
you can put newrealic or similar monitoring and find everything that slows down even faster.

Answer 2

Thanks for the answers, I looked in the logs, the error was in the syntax of the files I wrote, fixed the errors, did vagrant up and it worked