Step to reproduce this issue :

1. Install JIRA
2. Go to Control Panel change your regional and language
   • Format choose Thai
   • Location choose Thailand
3. Insert your valid license and proceed.
4. Create user and password and proceed.

Error shown like below :

When you click on 'Edit License or proceed under Evaluation Terms' and try to insert the License again error will be shown like below :

Expected :

JIRA to run normally, and proceed to login page.

Workaround :

1. Shut Down JIRA
2. Change to settings to English (United States, United Kingdom)
3. Re-start JIRA
4. Login page appear and you can login with user you created during the Setup Wizard steps.

Note : Change back the Language to previous settings after things worked correctly in English setting will result the same issue after re-starting JIRA.