There might be couple of reasons for this :

1. check the path , see that you are actually into the immediate parent folder
2. if there are any typo errors in the name of the contract or in the name of the files too , u will face the same error .. for this the following steps will be of help : a) first rectify the typo , then try again the deployment , using the forge script... command , then if it is successful it is fine, but if you get some error like failed to read artifact source file then follow the below mentioned process: ---> forge clean ---->forge build With that most probably you will be able to get through the issue .. I hope this helps ..