Fail to activate KRE offline license

I’ve generated an offline license for KRE (7.3.0) and attach it to a Linux machine. However, as I tried to run tests in offline mode, the offline activation failed. Please see the log below.

Start activating offline...
Search for valid offline licenses in folder: /home/vagrant/.katalon/license
Start checking license: KRE_b0a4b8f67e1d8eaf41a814287e50943a_27738573.lic
KRE_b0a4b8f67e1d8eaf41a814287e50943a_27738573.lic is valid.
The number of valid offline licenses: 1
Offline activation failed.
Start activating online...
License quota exceeded.
Project path is a folder.

What did I do wrong here?