There can be 2 reasons why you can’t login to Dashboard when test mode is enabled.

• One reason can be that the password for the test mode is different then the one for the live website. In this case you need to use the password you’ve set up for the test mode only, not the password for the live one.
• The second reason would be that there are some conflicts between the Flo Launch plugin and some security plugins existent on the website. In this case the best way would be to deactivate those security plugins while on the live version, since they’re not the most reliable ones and may cause problems in the future while trying to work on your website.