bug when anyone purchase

[ViruZzInGame]

[Server thread/CRITICAL]: TypeError: "muqsit\tebex\thread\TebexThreadPool::getLeastBusyWorker(): Return value must be of type muqsit\tebex\thread\TebexThread, null returned" (EXCEPTION) in "plugins/Tebex_dev-62.phar/src/muqsit/tebex/thread/TebexThreadPool" at line 63
--- Stack trace ---
#0 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/ThreadedTebexConnection(48): muqsit\tebex\thread\TebexThreadPool->getLeastBusyWorker()
#1 plugins/Tebex_dev-62.phar/src/muqsit/tebex/libs/muqsit/tebexapi/ConnectionBasedTebexApi(29): muqsit\tebex\handler\ThreadedTebexConnection->request(object muqsit\tebex\libs\muqsit\tebexapi\endpoint\queue\commands\online\TebexQueuedOnlineCommandsListRequest#234487, object muqsit\tebex\libs\muqsit\tebexapi\connection\response\TebexResponseHandler#234406)
#2 plugins/Tebex_dev-62.phar/src/muqsit/tebex/libs/muqsit/tebexapi/BaseTebexApi(74): muqsit\tebex\libs\muqsit\tebexapi\ConnectionBasedTebexApi->request(object muqsit\tebex\libs\muqsit\tebexapi\endpoint\queue\commands\online\TebexQueuedOnlineCommandsListRequest#234487, object muqsit\tebex\libs\muqsit\tebexapi\connection\response\TebexResponseHandler#234406)
#3 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/due/TebexDueCommandsHandler(48): muqsit\tebex\libs\muqsit\tebexapi\BaseTebexApi->getQueuedOnlineCommands(int 16720, object muqsit\tebex\libs\muqsit\tebexapi\connection\response\TebexResponseHandler#234406)
#4 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/due/playerlist/TebexDuePlayerList(34): muqsit\tebex\handler\due\TebexDueCommandsHandler->muqsit\tebex\handler\due{closure}(object pocketmine\player\Player#233807, object muqsit\tebex\handler\due\playerlist\TebexDuePlayerHolder#233815)
#5 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/due/playerlist/TebexDuePlayerList(70): muqsit\tebex\handler\due\playerlist\TebexDuePlayerList->onMatch(object pocketmine\player\Player#233807, object muqsit\tebex\handler\due\playerlist\TebexDuePlayerHolder#233815)
#6 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/due/TebexDueCommandsHandler(192): muqsit\tebex\handler\due\playerlist\TebexDuePlayerList->update(array[1])
#7 plugins/Tebex_dev-62.phar/src/muqsit/tebex/handler/due/TebexDueCommandsHandler(177): muqsit\tebex\handler\due\TebexDueCommandsHandler->onFetchDuePlayers(object muqsit\tebex\libs\muqsit\tebexapi\endpoint\queue\TebexDuePlayersInfo#233631)
#8 plugins/Tebex_dev-62.phar/src/muqsit/tebex/libs/muqsit/tebexapi/connection/response/TebexResponseSuccessHolder(27): muqsit\tebex\handler\due\TebexDueCommandsHandler->muqsit\tebex\handler\due{closure}(object muqsit\tebex\libs\muqsit\tebexapi\endpoint\queue\TebexDuePlayersInfo#233631)
#9 plugins/Tebex_dev-62.phar/src/muqsit/tebex/thread/TebexThread(135): muqsit\tebex\libs\muqsit\tebexapi\connection\response\TebexResponseSuccessHolder->trigger(object muqsit\tebex\libs\muqsit\tebexapi\connection\response\TebexResponseHandler#234491)
#10 plugins/Tebex_dev-62.phar/src/muqsit/tebex/thread/TebexThreadPool(83): muqsit\tebex\thread\TebexThread->collectPending()
#11 plugins/Tebex_dev-62.phar/src/muqsit/tebex/thread/TebexThreadPool(27): muqsit\tebex\thread\TebexThreadPool->collectThread(object muqsit\tebex\thread\TebexThread#189216)
#12 pmsrc/src/TimeTrackingSleeperHandler(58): muqsit\tebex\thread\TebexThreadPool->muqsit\tebex\thread{closure}()
#13 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(120): pocketmine\TimeTrackingSleeperHandler->pocketmine{closure}()
#14 pmsrc/src/TimeTrackingSleeperHandler(77): pocketmine\snooze\SleeperHandler->processNotifications()
#15 pmsrc/vendor/pocketmine/snooze/src/SleeperHandler(79): pocketmine\TimeTrackingSleeperHandler->processNotifications()
#16 pmsrc/src/Server(1740): pocketmine\snooze\SleeperHandler->sleepUntil(float 1743818319.2034)
#17 pmsrc/src/Server(1104): pocketmine\Server->tickProcessor()
#18 pmsrc/src/PocketMine(360): pocketmine\Server->__construct(object pocketmine\thread\ThreadSafeClassLoader#2, object pocketmine\utils\MainLogger#6, string[16] /home/container/, string[24] /home/container/plugins/)
#19 pmsrc/src/PocketMine(383): pocketmine\server()
#20 pmsrc(170): require(string[72] phar:///tmp/PocketMine-MP-phar-cache.0/PMMPEi5hOP.tar/src/PocketMine.php)
--- End of exception information ---