Solution 1

this problem is related to a corrupt sqlite database or the file doesn´t exist
Failed to open database 
android.database.sqlite.SQLiteCantOpenDatabaseException: unknown error (code 14): Could not open database

be sure to have the correct path, application package and database name, probably you are missing the extension (shams). 
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Solution 2

While searching for your problem i found this easy blog with easy manual solution codes which can maybe a help for you. Visit[^]
Try the solution and let me know if it works.