I got this errir while doing the Smack and Grab quest in Maldraxxis after i feed and mount the Bonetooth mob

Message: Interface\AddOns\Hekili\Events.lua:2324: attempt to index local 'btn' (a nil value)
Time: Sat Dec 5 18:31:31 2020
Count: 31
Stack: Interface\AddOns\Hekili\Events.lua:2324: attempt to index local 'btn' (a nil value)
[string "@interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua"]:758: in function <...Ons\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:717>
[string "=[C]"]: ?
[string "@interface\AddOns\Hekili\Events.lua"]:2324: in function `handler'
[string "@interface\AddOns\Hekili\Events.lua"]:56: in function <Interface\AddOns\Hekili\Events.lua:50>

Locals: errMsg = "Interface\AddOns\Hekili\Events.lua:2324: attempt to index local 'btn' (a nil value)"
isBugGrabber = nil
tsmErrMsg = nil
oldModule = nil
private =

{
globalNameTranslation = {
}
FormatErrorMessageSection = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:517
ErrorHandler = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:134
origErrorHandler = defined @interface\SharedXML\SharedBasicControls.lua:355
hitInternalError = false
CreateErrorFrame = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:536
num = 0
SanitizeString = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:510
AddonBlockedHandler = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:502
GetStackLevelInfo = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:344
ParseLocals = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:396
ignoreErrors = false
errorReports = {
}
IsTSMAddon = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:478
localLinesTemp = {
}
GetStackInfo = defined @interface\AddOns\TradeSkillMaster\LibTSM\Service\ErrorHandler.lua:313
}
MAX_STACK_DEPTH = 50
OLD_TSM_MODULES = {
1 = "TradeSkillMaster_Accounting"
2 = "TradeSkillMaster_AuctionDB"
3 = "TradeSkillMaster_Auctioning"
4 = "TradeSkillMaster_Crafting"
5 = "TradeSkillMaster_Destroying"
6 = "TradeSkillMaster_Mailing"
7 = "TradeSkillMaster_Shopping"
8 = "TradeSkillMaster_Vendoring"
9 = "TradeSkillMaster_Warehousing"
}