The system is running CentOS 7.9.  The researcher who reported this error says:

"This error occurred when attempting to run v19.2 Ansys Mechanical with Workbench. My Workbench project consists of a single Static Structural analysis system. Everything is configured correctly (e.g., valid Geometry, Mesh, boundary conditions, etc) in the system. However, if I attempt to 'Update' the Solution cell of the system in the project schematic OR open the Mechanical application itself and solve there, Workbench reports an 'error updating the Solution cell' and several messages are given (error updating, check solution output, etc). However, there is no error reported in the solution output file. Only the aforementioned error in the terminal appears. I hope this helps."