Cannot read property 'toUpperCase' of null

[ElderOrb]

/Users/test/ssh-fun/rex/server/node_modules/ssh2/lib/protocol/Protocol.js:1672
let signal = name.toUpperCase();
^

TypeError: Cannot read property 'toUpperCase' of null
at Protocol.exitSignal (/Users/test/ssh-fun/rex/server/node_modules/ssh2/lib/protocol/Protocol.js:1672:23)
at Channel.exit (/Users/test/ssh-fun/rex/server/node_modules/ssh2/lib/Channel.js:257:32)
at ChildProcess. (/Users/test/ssh-fun/rex/server/server.js:87:20)
at ChildProcess.emit (node:events:394:28)
at maybeClose (node:internal/child_process:1067:16)
at Socket. (node:internal/child_process:453:11)
at Socket.emit (node:events:394:28)
at Pipe. (node:net:672:12)