Pylontech UP2500 firmware

Hi Guys, I am urgently looking for the UP2500 (24V) firmware. they come in 2 flavors, one that explicitly says CAN in the filename (for the batteries that did have the CAN port), and one that doesn’t. I have the CAN version, but I am looking for the OTHER one… If I flash the CAN version on the batteries that don’t have that, it comes up with “Fuse fail” error afterwards, even though it was working fine before the flash, so it’s definitely reporting something wrong when the wrong firmware is loaded.

Can anyone help with that please?