So it keeps sending you in the "Update system, updating system 1%, then can't update." Then Updates needed or available - then can't update "wait" CIRCLE OF ROKU **bleep**... Right? Are you using A $30-ish (2022) Roku Express 4K ???
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Try going into the secret screen, via tapping the home button 5×'s, then FFrwd 3×'s, then Rrwnd button 2x's. And click; "cycle software update server." Thus changing "beta" to "release". It sometimes will help Land that update. If not Factory reset everything. Try it again tomorrow. If still "can't update". Return the device.