Hello! I was wondering if anyone knew how I could fix this error I keep getting?

I have uploaded all my data and done all the covariates, but when I go to pre-process, it gives me the same error description every time. I converted all the files from DCM to NIFTI (.nii), and all the functional and structural data for the participants are there. It is below:

The following modules did not run:
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp
Failed: Realign & Unwarp

ERROR DESCRIPTION:
Error using MATLABbatch system
Job execution failed. The full log of this run can be found in MATLAB command window, starting with the lines (look for the line showing the exact #job as displayed in this error message)
------------------
Running job #1
------------------
CONN19.c
SPM12 + DAiSS DEM FieldMap MEEGtools
Matlab v.2019b
project: CONN19.c
storage: 18.8Gb available
spm @ /Users/LOGIN/spm12
conn @ /Applications/conn

Futhermore, it seems that the main error is as follows:

28-May-2020 12:48:16 - Failed 'Realign & Unwarp'
Error using mat2file (line 16)
mat2file.c not compiled - see Makefile 

The mat2file is in the /Users/LOGIN/spm12/@file_array/private folder 

I am running this on a Mac (Catalina 10.15.4) with MATLAB 2019b. I wonder if it is because I only have 18.8 Gb available for my disk space. Would that be the issue? I have tried reinstalling SPM12 three times, and nothing changes every time.