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I am not sure what is triggering the error. I guess it might be due to the absence of a source component and improper initial values. I have attached a working model here: https://amoeba.wolfram.com/index.php/s/FraFRbYNy2NAXYQ
Check the following thread: https://community.wolfram.com/groups/-/m/t/2466465 Status is still a work in progress.
Excellent news, Henrick. Thanks for sharing your progress.