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The exact same thing happened to me. I worked patiently with ST online support for more than 6 months while they cycled me through the same process countless times on iOS, IpadOS, and Android all the while “escalating” to higher tier support (that never did respond). Finally they requested a series of documents to return or replace the hub back to them. Today I received an email stating that I have to return the device where I purchased it, more than 6 months later after being patient and supportive of their process. No retail outlet will accept a return after 6 months. I am stuck with 2 Connect Home Pro Hubs that Samsung Support cannot solution beyond the errors you listed above and cannot get replaced. The most disappointing outcome a customer could hope for. After owning 7 Samsung appliances and trying to integrate them into the ST ecosystem, this will be our last attempt. It is too bad as the brand and appliances are reasonable but the support doesn’t seem to be in place. Good luck with trying to find a solution; if you do please post it here. Don’t wait too long for a solution from ST support as you will be stuck with the unit.