I just purchased a new Family Hub refrigerator and it says it has Tizen 4.0 and the update button is greyed out like yours. 4.0 is a 2017 release...and their technical support department is telling me I'll just have to wait for the 6.0 update. I told him I just paid a lot of money for a brand new refrigerator in May that apparently came with old software...and he told me that sometimes happens and I'd have to talk to the software developers. Wow. Just...wow.
same problem... I got a message a couple of days ago about the update with all the changes they were gonna make, I clicked accept but didn't get any update and the button is greyed out
Will resetting to factory settings solve this?
Honestly, count yourself lucky. Look at some of the other posts about the upgrade. If you like the fridge how it works now I wouldn't update because you'll probably be disappointed with all the things they changed/removed/broke.