I have the same issue with two of my X10s (2 of 5 have this issue). I've tried IE, FF, Chrome with no differences, also tried from a linux system with no luck. If I manually change the website address from login.php to miner.php, it allows you to see the miner's stats. But you can't change any settings in there.
I haven't tried reflashing the SD card yet. But they are running the latest version that Baikal released on Jan 1st.
At least i'am not the only one?
Did you contact Baikal Support yet? If yes, what did they answer?
What are you going to try to do other than eventually reflashing the SD card?