One friend cannot join my server but can join public servers

[mcraftersg]

Recently I started a fabric server, and all my friends have been able to join except one. The server appears as offline for her and occasionally pops online, but when she tries to connect she gets the "Connection refused: No Further Information" error. On the server console nothing shows up when she tries to join. She has no issues joining public servers like Hypixel, she just can't join mine.

I was running a paper server a few months ago and she had no problems joining that one. I have it connected to a freenom domain through cloudflare. Nothing much has changed on both sides, its the same ip, port, etc and she hasn't installed anything new. I showed her how to allow Minecraft and java through the firewall. Tried with the firewall completely off. Tried updating java. Tried changing to the Microsoft store version of the Minecraft launcher. Tried connecting via ip address instead of the domain name. Tried a VPN. Nothing seems to work.

There's a ton of threads on this error but most of them are resolved by simple things like entering a different ip address, and the rest just fix themselves without the person knowing why. I thought this would be the one time my server worked off the bat with minimal issues, and then this happens.. its so frustrating

[Paint_Ninja]

This is the Minecraft Forge forums, we do not support Fabric here.