We've been able to reproduce a scenario where if you had a Lansweeper 5.x installation with multiple servers, then updated to 6.0 (not 6063), and then updated to 6.0.0.63, you get switched from the old encryption method (without encryption.txt) to the new encryption method. This switch causes password hash errors until all servers are updated and encryption.txt is copied over from the server you updated first to all other Lansweeper servers. In some cases passwords need to be re-entered after this action so they can be re-encrypted.
We're investigating a solution for this so this issue doesn't occur during future Lansweeper updates for installations that went through this scenario (5.x->6.x->6.0.0.63). Do note though that if you're already on 6.0.0.63 and you're experiencing password hash issues, that you will only need to
resolve them once, and a future update should not cause this issue to recur.
Our apologies for any inconvenience caused.