User can't connect to VPN with their creds but I can?

I want to preface this by saying this is the most ridiculous problem I have ever encountered. The client is using a Meraki connection and using the built-in Windows VPN tool (I know, it's garbage). Whenever the user attempts to sign in, they get an error stating that the remote computer refused the connection. I restarted the computer, re-added the connection, tried every combination of adapter settings, nothing was working. I had the user type their credentials in a notepad, and then I copied it and pasted in, and wala, it connected. I had the user do the exact same thing and it didn't work. I even had them show me the password that was in the sign-in window and it was the same. The only difference is that I was connected to their computer via the Ninja RMM remote connect tool. But even so, from the VPN's perspective it should be the exact same whether I'm the one copying and pasting the credentials or the user is? I have no clue what's going on. This isn't the first user to have this exact same issue either. With the previous user, we replaced their computer and they still had the problem. Someone please tell me you've encountered this and know a fix.