How to run the WRF-CROCO coupling model?

I set up the mynamelist.sh file according to the wrf-croco coupling in the manual(https://croco-ocean.gitlabpages.inria.fr/croco_doc/tutos/tutos.16.coupling.run.html). But there are the following errors, how to solve it?
./submitjob.sh: line 36: DT_OCE: unbound variable

myjob.sh
mynamelist.sh
submitjob.sh

Another question is how do I determine the ${MACHINE} option?And, is there any documentation for these variables?

The MACHINE variable allows to automatically set up some environment variables and job submission instructions for know machines. The are a few known machines already included: classical Linux and some super-computers. But you can add your own MACHINE set up by adding a directory in SCRIPTS_TOOLBOX/MACHINE.

Check the existing machines, and create a similar directory for your own machine with the same scripts inside (e.g. header.Linux, launch_Linux.sh, myenv.Linux, myenv.Linux.wrf, myenv.Linux.ww3, with Linux changed to your machine name). You obviously need to adapt these scripts to your machine.