Want to use Pre-installed QE without mpirun

I installed BURAI on my Ubuntu 18.04 system. I have provided the path to my QE executable (which was already installed on my system). But I am afraid my installed QE is a serial version and BURAI tries to run it using mpirun as the error that crops up reportedly says so.

Is there a way to run QE without mpirun through BURAI ?

EDIT: Ok.. I just tried using mpirun to run my preinstalled QE through terminal and it works fine. But somehow burai throws an error. I did the following

1. Checked where burai is looking for mpirun executables and its all good there.

2. Tried running burai with sudo priveleges. Still the same error.

3. Tweked the command for mpirun from the default supplied in burai to mpirun -np 4 (i.e i added the number of processors manually)

After all of these, the error that crops up is same.