Magento 2.3 + store pickup : main.CRITICAL: Unable to resolve the source file

Question

I am locked, i have the following error :

main.ERROR: Unable to resolve the source file for 'frontend/WEB/website/en_US/Magestore_Storepickup/css/bootstrap/bootstrap.css.map' [] [] main.CRITICAL: Unable to resolve the source file for 'frontend/WEB/website/en_US/Magestore_Storepickup/css/bootstrap/bootstrap.css.map' []

I don't understand this error because bootstrap.css.map is nowhere called in the source code according to VScode search. Does someone had the same problem ? how did you solved it ?