Searching for Firmware for the Galaxy TAB ACTIVE PRO LTE (SM-T545) on your site in the firmware section, it first shows the correct Name in Field:
Galaxy Tab Active Pro (LTE) (SM-T545) but then the results only shows up the different Versions for the WiFi Version SM-T540.
Also you are not able to select the country from drop down, you have to enter it manually.
Maybe if you finde the time have an look on this and please add also the SM-T545 Firmwares to your fantastic site.

Thanks a lot
Regards Tanis64