Cannot change notification settings

[paulakreuzer]

Maybe the following workaround helps that saved people who were stuck in “do not disturb” mode:

@Volker

Settings->Sound & notification->Do not disturb->Automatic rules->Add rule
Added a temporary rule there so that this rule just enabled and then DISABLED “do not disturb” mode (via setting “end time” to very soon). This way “do not disturb” finally was disabled again for me.