Socket not writable error

[web75018]

Hi, im getting this issue:

{"name":"ftpAK","hostname":"A-M700","pid":55433,"id":"7d9ca748-21d1-4769-8752-41fef38874c0","ip":"192.168.100.200","level":50,"msg":"Satisfy Parameters Error { error: 'Socket not writable' }","time":"2022-08-20T22:55:01.653Z","v":0}

My config:

environment : production.

const server = new FtpServer({
log: bunyan.createLogger({ name: "ftpAK", level: "trace" }),
url: "ftp://192.168.100.110:5358",
pasv_url: "192.168.100.110",
pasv_min: 5359,
greeting: ["Welcome", "FTP"],
tls: {
key: fs.readFileSync(${__dirname}/cert/server.key),
cert: fs.readFileSync(${__dirname}/cert/server.crt),
ca: fs.readFileSync(${__dirname}/cert/server.csr),
},
file_format: "ep",
anonymous: false,
});

.....

Thanks for your help.