Can't upload files to my free webhost ftp

Greetings. I am not being able to upload files to my ftp, whether by ftp client or through the File Manager, I have been trying since 2 days ago.

First I have this problem, but it seems to be solved:

But I can’t really tell, because I’m going through a different problem: everytime I try to upload a file,this happens (using filezilla):
Status: Logged in
Status: Starting upload of E:\wamp64\www\Websites\Development\somewebsite.com\public\index.html
Command: CWD /public_html/test
Response: 250 OK. Current directory is /public_html/test
Command: PWD
Response: 257 “/public_html/test” is your current location
Command: TYPE A
Response: 200 TYPE is now ASCII
Command: PASV
Response: 227 Entering Passive Mode (145,14,144,87,195,136).
Command: STOR index.html
Response: 150 Connecting to port 43963
Error: Connection timed out after 20 seconds of inactivity
Error: File transfer failed
Status: Disconnected from server

And then, when it reconnects, it retries, but a 0 bytes version of the file is already there, and no matter how many times I try to upload and overwrite the file, it still has 0 bytes.
My luck using the File Manager was slightly better. I had to compress my project and then extract, and it worked. But I’d rather use a ftp client instead.

Did you try limiting the connections?