i was having the same problem (500 internal error)
my problem was that i havent configured it right my RabbitMQ in the
~/taiga-back/settings/config.py
which there is two places you should change the url (as the following image):
before all of this make sure that the RabbitMQ is running
import pika
connection_url = "amqp://rabbitmquser:rabbitmqpassword@0.0.0.0:5672/taiga"
try:
parameters = pika.URLParameters(connection_url)
connection = pika.BlockingConnection(parameters)
print("Connected to RabbitMQ successfully!")
connection.close()
except Exception as e:
print("Failed to connect to RabbitMQ:", e)
use this python script to make sure that everything is ok