404(Bad Request)

[yinan-star]

My console has been keeping reported this issue:
POST https://msgstore.www.notion.so/primus-v8/?sessionId=656de0c3-86c1-4504-ac43-c8b370d0a4a3&_primuscb=OnZg0vg&EIO=4&transport=polling&t=OnZg12T&b64=1&sid=m9-ba46TgJltkgezAC4k 400 (Bad Request)
But my Page worked correctly. That's ridiculous. Does anybody couls fix this sort of issue? And as I was testing my website, the time of loading was too long. Sometimes it needs 15min to load.