WebForms UnobtrusiveValidation Mode requires a ScriptResourceMapping for jQuery

In a specific situation (like using required validator) you may get the below server error:

Error : WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for ‘jquery’. Please add a ScriptResourceMapping named jquery (case-sensitive).

scriptresourcemappingSolution:  Continue reading WebForms UnobtrusiveValidation Mode requires a ScriptResourceMapping for jQuery