Issue in running mqtt subscribe block in raspberry pi

I am currently having the issue of running my vsm file that just included the new mqtt subscribe block. The vsm file is converted into out file and run on my raspberry pi. Whenever I publish the new value onto the topic, the out file will say it receives the latest value but then end with unhandled signal 11, terminated. I also tried to run the standard vsm file of MqttIoTStudioBrokerTestRaspberryPi from Altair embed, it has the same issue as well. Screenshots attached below:

My vsm files are attached below as well. Is this a bug of the mqtt subscribing block, if not is there any solution? Thank you