Something wrong with SMR

My anki version is ⁨2.1.53+Qt6, and i have disabled other addons. But problems are as follows.
When first open the addon, it shows "An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed. …"When second open the addon, anki quits suddently.
I have made lost tries, it remaind the same.

What is SMR? Please post the full error shown.