AttributeError: Setting variables on Sanic instances is not allowed. You should change your Sanic instance to use instance.ctx._startup instead.

[sooswastaken]

When I run this code on sanic 21.12.0, it errors and can't run. It works on older versions of sanic though.

from sanic import Sanic, response
from sanic_cors import CORS
app = Sanic(__name__)
CORS(app)

@app.route("/")
async def index(request):
    return response.text("Hello, World!")

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=80)

[ashleysommer]

This is an incompatibility with Sanic-CORS v1.0.1 and Sanic v21.12.0
Please update to Sanic-CORS v2.0 to get compatibility with Sanic v21.12.0