After running make in dependencies you need to update the file: /dependencies/include/taucs.h. Comment out the following definitions:
#ifndef isnan
// Runia, 2019-04: line disabled because compiler error
//extern int isnan(double);
#endif
//...
#ifndef isinf
// Runia, 2019-04: line disabled because compiler error
//extern int isinf(double);
#endif
Expected value to be of type array, but found Null instead. ==> Solve by adding a motions field to the JSON.