invalid mode 'kCFRunLoopCommonModes'

invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific - break on _CFRunLoopError_RunCalledWithInvalidMode to debug

I get this warning when I tap either of the switches shown below. I've tried capturing the switch state in a var and using that to trigger the do/catch statement but no joy. I've even tried pulling the do/catch into separate functions and I still get the warning. Has anybody else run into this and how did you fix it?

@IBAction func greetingFormat_Tapped(_ sender: UISwitch)
    {
        let theQuery = theTable_Settings.filter(settingID == 1)
       
        if sender.isOn
        {
            do {
                if try Database.shared.databaseConnection!.run(theQuery.update(greeting_Format <- "true")) > 0
                {
                    greetingFormatLabel_Outlet.text = NSLocalizedString("HelloMrSmith_String", comment: "")
                } else {
                    print("greeting format true not found")
                }
            } catch {
                print("greeting format true update failed! Error: \(error)")
            }
        } else {
            do {
                if try Database.shared.databaseConnection!.run(theQuery.update(greeting_Format <- "false")) > 0
                {
                    greetingFormatLabel_Outlet.text = NSLocalizedString("HiJoe_String", comment: "")
                } else {
                    print("greeting format false not found")
                }
            } catch {
                print("greeting format false update failed! Error: \(error)")
            }
        }
    }

@IBAction func nonrefundableSwitch_Tapped(_ sender: UISwitch)
    {
        let theQuery = theTable_Settings.filter(settingID == 1)
        var itsOn: String = ""
       
        if sender.isOn
        {
            itsOn = "true"
        } else {
            itsOn = "false"
        }
       
        if itsOn == "true"
        {
            do {
                if try Database.shared.databaseConnection!.run(theQuery.update(nonRefundable_Bool <- "true")) > 0
                {
                    depositDueLabel_Outlet.text = NSLocalizedString("nonRefunddepositisdue_String", comment: "")
                } else {
                    print("nonRefundable true not found")
                }
            } catch {
                print("nonRefundable true update failed! Error: \(error)")
            }
        } else {
            do {
                if try Database.shared.databaseConnection!.run(theQuery.update(nonRefundable_Bool <- "false")) > 0
                {
                    depositDueLabel_Outlet.text = NSLocalizedString("depositisdue_String", comment: "")
                } else {
                    print("nonRefundable false not found")
                }
            } catch {
                print("nonRefundable false update failed! Error: \(error)")
            }
        }
    }