Uploading with TUS upload url CONNECTION REFUSED

Hi.
I don’t know why 2 days ago I uploaded files successfully and today I can not, with a CONNECTION REFUSED error in Chrome and Safari so no information from TUS.

I don’t know where to begin to know the problem origin.
I don’t remember to have changed anything.

The only weird thing is today I saw a 502 error for a little time in the morning, now, in (my) afternoon I have this problem. The error came form Cloudflare (not my server), my domain is under Cloudflare.

Thanks.

Hello.
It seems to be working now, without any changes made by us.
Please, tell me what happened and if it will happens again. I’m afraid with that . Our customers could kill me if it was in a production environment.

Thanks in advance.