Fatal Error: Unphysical field variables detected. gas temperature lower than 250℃

Hi peers, I want to simulate heat transfer in a two-staged spout fluidized bed. However, it always report the following error at 0.7 s.
Fatal Error: Unphysical field variables detected.
I J K
2 75 2 T_G = 250.0 <= 250.0
Error from check_data_30.f:299
Unphysical field variables detected on one or more processes.
erjipendong.zip (58.5 MB)

Attachment is the case. I have tried all the previous solution for similar error but failed.

Anyone could help me?

erjipendong.zip (58.5 MB)

Did you inspect the mesh? Looks like the mesh is too coarse to resolve the baffles.