Deactivate unserialize from the options like the error says. That will solve your problems.

mengidd said:

Deactivate unserialize from the options like the error says. That will solve your problems.

Yeah, I get that but if I do that I do not get any readable contents about the job.

{
    "job":"IlluminateQueueClosure",
    "data":{
        "closure":"eyJpdiI6IjRtd0pvTEZOcFJoMHZBdkNXd2szdmc9PSIsInZhbHVlIjoiMU5wRnZPSHlhTGl2RzB4YmNXVWxNc2V6MjVNb2VPUlVKbmdpMExYemkrS1Ryc1E0ZDF6d0dncEJVcEVZMTZqZVJySmloQzBVbGExRHIwMUJxNmwzeG93TjZHSndoV2xzamVTWEh4bmdaQ2dsdndJbHVabWVXbnVwUm9yYVoweE8rNGRLWjE1Q1BLZ1wvWUd1Qk9JRW0wZ095YUhHMTZlVUcyTzBwZWVRTzdPMG5cL1lcL0tydnIzcFg3dXpjRjdFTHF4emVaeEdPS2VJRUMzUXBkMVhDeFFvTlNmOVRON0ozT0g3bkNDN3ltSXhNST0iLCJtYWMiOiI5MTI5MDVjZTc2OTg4MmEwYzgwNmE5Y2YwZTczMzcyZTJiM2E5NGI1N2UxNWUxNWE3NWVhMzRhYzRkY2RhOGE3In0="
    }
}

I'd rather know why it is happening and how to avoid it if I can.

If you disable unserialize it should use json_decode instead, which seems to fit you prefectly as the actual data you have is json. If it still doesn't work I'm clueless unfortunately.