If you get the error message Altair One: Credentials were rejected when trying to authenticate for machine on Altair One from an application, try the following steps:

1. Make sure your username and password are correct. Your username is the email address you used to register on Altair One. Your password is the same you use to connect on Altair One.
   
   
2. Make sure your password only contains the following characters:
   !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~
   If you password contains other characters, please change it.
   Other characters such as € or £ will work for logging in the Altair One website but will not work for authenticating from an application.
   this is a known issue which will be fixed in a future version.
   
   
3. In last resort, define a new password for your Altair One account.

In case you forgot your password, you can reset it from Altair One.