Double Take: Invalid or unexpected token

[Code-TT]

After installing Double Take and starting it, I get this error:

/double-take/api/node_modules/mqtt/node_modules/ws/lib/permessage-deflate.js:1
�
^
SyntaxError: Invalid or unexpected token
    at Object.compileFunction (node:vm:360:18)
    at wrapSafe (node:internal/modules/cjs/loader:1084:15)
    at Module._compile (node:internal/modules/cjs/loader:1119:27)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1209:10)
    at Module.load (node:internal/modules/cjs/loader:1033:32)
    at Function.Module._load (node:internal/modules/cjs/loader:868:12)
    at Module.require (node:internal/modules/cjs/loader:1057:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at Object.<anonymous> (/double-take/api/node_modules/mqtt/node_modules/ws/lib/websocket.js:14:27)
    at Module._compile (node:internal/modules/cjs/loader:1155:14)

Any idea what the problem is and how to fix it?
I'm running HA in a Proxmox VM and that instance 6 GB of RAM.