You can access the FW update here: http://tachosafe.ro/web/rduadmin/updateterminals if you are a manager.

If the Terminal is online  or online but in roaming 

1. Check if the terminal is really online with the button in the first row.

2. Update the terminal with the latest FW available online.

Note: GPRS2 units produced before 2020-04-08 can't be updated online. If you want to update this units open a ticket for them.