Bosch dishwasher error code e21

Dishwasher Repair
1

Brand: Bosch
Model Number:SHXM78W55N/01
Main Symptom:
What happens & when:

Error Code (if any): e21
Parts or tests already tried: reset and restarted 2x same after restart I can hear a motor running sound then error code e21
Photos / video link:

2

E21 means it thinks there is a blockage in the circulation pump 12008381. I’d check that for any obvious debris or damage 1st.

https://www.appliancepartspros.com/bosch-heat-pump-12008381-ap5984938.html