fio-plot: bench-fio fails with error: fio: failed parsing size= parameter

Hello, I’m trying to execute this command bench-fio --target /mnt/hdd/fio --output CCLOUD_HDD --type file --mode randread,randwrite,randrw --rwmixread 75 --size 10G --block-size 4k,64M --iodepth 1 --numjobs 1 --direct 1 --engine libaio --precondition --runtime 60 --destructive --extra-opts norandommap=1 refill_buffers=1 but it fails with error:

                                                   +++ Fio Benchmark Script +++

Estimated duration            : 0:01:00
Test target                   : /mnt/hdd/fio
Job template                  : /home/ccloud/.local/lib/python3.10/site-packages/bench_fio/benchlib/../templates/fio-job-template.fio
I/O Engine                    : libaio
Test mode (read/write)        : randread,randwrite,randrw
IOdepth to be tested          : 1
NumJobs to be tested          : 1
Block size                    : 4k,64M
Direct I/O                    : 1
Specified test data size      : 10G
Run precondition workload     : True
Output folder                 : CCLOUD_HDD
Precondition template         : /home/ccloud/.local/lib/python3.10/site-packages/bench_fio/benchlib/../templates/precondition.fio
Time duration per test (s)    : 60
Benchmark loops               : 1
Extra custom options          : norandommap=1 refill_buffers=1
Log interval of perf data (ms): 1000
Invalidate buffer cache       : 1
Allow destructive writes      : True
Target type                   : file
Number of benchmarks          : 1

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   0% |                         | -   [0:00:00, -:--:--]
An error occurred: fio: failed parsing rw=${MODE}
fio: job iotest dropped -

Can you please advise how to fix this? And I wonder why parameter --rwmixread 75 is not reflected in output.