if you only get cramping here during ework, then it is definitely ebody chakra related.

these areas relate to solar plexus chakra, and are generally also related to personality self esteem and personal power.

There are ways to work on this, and you may have tried some

Meditate on these issues, and consider to get a checkup by a therapist on self esteem /power issues

if cramping is not too severe, try some intense ework sessions where you do heavy work on these areas.

Also, try doing banishments and consecrations on these areas.

Try marking these areas with circle and X in blue ballpoint pen.

Try Tiger Balm.

Experiment with crystals and stones.

affirmations are your most powerful tool. Spoken aloud. 'my solar plexus chakra is happy. my self esteem is good. my personal power is strong. my solar plexus chakra activates easily' and similar. When you do this, imagine these areas smiling and laughing happily. Also 'my kundalini raises easily and powerfully' and similar, will help.

make good use of driving time and waiting and alone time for these.