Macros with /y no longer working

Same problem. /s phrase macro gives following error with all addons disabled.

Message: Interface/FrameXML/ChatFrame.lua:4524: attempt to concatenate a nil value
Time: Wed Oct 25 10:13:18 2023
Count: 2
Stack: Interface/FrameXML/ChatFrame.lua:4524: attempt to concatenate a nil value
[string "@Interface/FrameXML/ChatFrame.lua"]:4524: in function `ChatEdit_UpdateHeader'
[string "@Interface/FrameXML/ChatFrame.lua"]:4883: in function <Interface/FrameXML/ChatFrame.lua:4845>
[string "=(tail call)"]: ?
[string "@Interface/FrameXML/ChatFrame.lua"]:4960: in function `ChatEdit_ParseText'
[string "@Interface/FrameXML/ChatFrame.lua"]:4634: in function `ChatEdit_SendText'
[string "@Interface/FrameXML/ChatFrame.lua"]:3015: in function <Interface/FrameXML/ChatFrame.lua:3009>
[string "=[C]"]: in function `UseAction'
[string "@Interface/FrameXML/SecureTemplates.lua"]:343: in function `handler'
[string "@Interface/FrameXML/SecureTemplates.lua"]:625: in function `SecureActionButton_OnClick'
[string "*ActionBarFrame.xml:15_OnClick"]:4: in function <[string "*ActionBarFrame.xml:15_OnClick"]:1>

Locals: editBox = EditBox {
 0 = <userdata>
 autoCompleteParams = <table> {
 }
}
type = "RAID"
info = <table> {
 colorNameByClass = true
 flashTab = false
 b = 0
 r = 1
 id = 4
 sticky = 1
 flashTa****eneral = false
 g = 0.498039
}
(*temporary) = <table> {
 UpdateOnBarHighlightMarksBySpell = <function> defined @Interface/FrameXML/ActionButton.lua:70
 ERR_OUT_OF_CHI = "Not enough chi"
 DH_HAVOC_CORE_ABILITY_2 = "Strong melee attack that consumes Fury. If it critical strikes, some Fury is refunded."
 MultiCastActionButton6Cooldown = MultiCastActionButton6Cooldown {
 }
 SettingsSliderOptionsMixin = <table> {
 }
 GetTrainerServiceTypeFilter = <function> defined =[C]:-1
 UNIT_NAMES_COMBATLOG_TOOLTIP = "Color unit names."
 SetTrainerServiceTypeFilter = <function> defined =[C]:-1
 LE_GAME_ERR_CHAT_RAID_RESTRICTED_TRIAL = 793
 SPELL_FAILED_CUSTOM_ERROR_71 = "This partygoer wants to dance with you."
 LE_GAME_ERR_PET_SPELL_TARGETS_DEAD = 410
 ERROR_CLUB_TICKET_COUNT_AT_MAX_COMMUNITY = "Can't create any more invite links for this group."
 CompactUnitFrameProfilesGeneralOptionsFrameHealthTextDropdownButtonNormalTexture = CompactUnitFrameProfilesGeneralOptionsFrameHealthTextDropdownButtonNormalTexture {
 }
 MultiCastActionButton2Cooldown = MultiCastActionButton2Cooldown {
 }
 ERR_TRADE_EQUIPPED_BAG = "You can't trade equipped bags."
 PVP_RANK_6_1 = "Corporal"
 MultiBarLeftButton7 = MultiBarLeftButton7 {
 }
 AudioOptionsVoicePanelOutputDeviceDropdownButtonHighlightTexture = AudioOptionsVoicePanelOutputDeviceDropdownButtonHighlightTexture {
 }
 VideoOptionsFrameDefaults = VideoOptionsFrameDefaults {
 }
 MerchantItem1AltCurrencyFrameItem1Text = MerchantItem1AltCurrencyFrameItem1Text {
 }
 OPTION_TOOLTIP_ACTION_BUTTON_USE_KEY_DOWN = "Action button keybinds will respond on key down, rather than on key up."
 BINDING_NAME_NAMEPLATES = "Show Enemy Name Plates"
 INSTANCE_UNAVAILABLE_OTHER_TEMPORARILY_DISABLED = "%s cannot enter. This instance is temporarily disabled."
 MultiBarBottomRightButton8Shine5 = MultiBarBottomRightButton8Shine5 {
 }
 IsReferAFriendLinked = <function> defined =[C]:-1
 MAIL_LETTER_TOOLTIP = "Click to make a permanent
copy of this letter."
 UnitFrameManaBar_UnregisterDefaultEvents = <function> defined @Interface/FrameXML/UnitFrame.lua:623
 CALENDAR_RAID_RESET_DESCRIPTION = "%1$s resets at %2$s."
 CHAT_CONFIG_OTHER_COMBAT = <table> {
 }
 CONSOLIDATED_BUFFS_PER_ROW = 4
 BOOST2_WARRIOR_COLOSSUSSMASH = "Use Colossus Smash.

Colossus Smash increases your damage."
 BN_UNABLE_TO_RESOLVE_NAME = "Unable to whisper '%s'. Blizzard services may be unavailable."
 AutoCompleteEditBox_OnKeyDown = <function> defined @Interface/FrameXML/AutoComplete.lua:368
 CompactRaidFrameManagerDisplayFrameHiddenModeToggleTopRight = CompactRaidFrameManagerDisplayFrameHiddenModeToggleTopRight {
 }
 LFGTeleport = <function> defined =[C]:-1
 LE_GAME_ERR_ONLY_ONE_QUIVER = 33
 SpellButton6Cooldown = SpellButton6Cooldown {
 }
 LOSS_OF_CONTROL_DISPLAY_FEAR = "Feared"
 Grap