In the salesforce spring 21 update, the $A.createComponents command and the $ A.createComponent command will no longer work, and I believe it has an impact on strike components like strike_row and I think it needs adjustment. follows lik of salesforce reference :
https://help.salesforce.com/articleView?id=release-notes.rn_aura_expr_dynamic_cmp_ru_230.htm&release=230&type=5