MFiX tutorial 3.3 running error

Hi, I installed MFiX 25.2.1 and am currently learning how to use it. I followed the tutorials, specifically Tutorial 3.3: Two-Dimensional Fluidized Bed (DEM). I followed all the steps exactly as described in the user guide, but when I try to run it, I get the following error:
Error 2001: No interpolation scheme specified when DES_INTERP_ON is enabled.

Could you please guide me on how to solve this problem?

Please see Tutorial 3.3 does not run without specifying interpolation scheme

and in general, search the forum before posting a question, to see if it has already been answered.

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