Cannot connect to FTP server (No supported authentication methods available (server sent: publickey))

I've been trying to upload some files on my website but I can't connect via FileZilla. Here is the error I am getting.

Status: Connecting to 45.33.95.49…

Response: fzSftp started, protocol_version=8

Command: open "webadmin@45.33.95.49" 22

Error: Disconnected: No supported authentication methods available (server sent: publickey)

Error: Could not connect to server

Status: Waiting to retry…

Status: Connecting to 45.33.95.49…

Response: fzSftp started, protocol_version=8

Command: open "webadmin@45.33.95.49" 22

Error: Disconnected: No supported authentication methods available (server sent: publickey)

Error: Could not connect to server

I have no trouble connecting to my server via the command line. I think this has to do with the fact that I introduced a new SSH key for a class I'm taking. I tried making a new SSH key pair but then that locked me out of my server on the command line. Luckily i backed the old ones up on my hard drive and put them back in the original place, so again: I can access my website via the command line with no issues, but I get this message when I try to access it via FTP.

I've already tried following this solution: it doesn't change anything

https://www.digitalocean.com/community/ … on-methods">https://www.digitalocean.com/community/questions/trying-to-login-to-filezilla-ftp-disconnected-no-supported-authentication-methods