Issue	What it means
You need to input your licence key.	You haven’t entered your licence key and can’t use premium functions.
You need to input a domain.	You need to add a valid domain to return keywords the domain ranks for.
You do not have enough credits for this request.	You need to update your credits to continue using the competitor keywords function.
Please enter a valid sort by value.	You have entered an incorrect sort by value. Please use search volume, latest month volume, last three month volume, cpc, growth, quarterly growth, age
Please change 'page' to a value instead of a string.	You have added the page value as a string instead of a number. Change to a numerical value eg. 3 instead of “3”.
Cannot return keywords for the domain. Please try another domain. No credits have been used.	You have entered a domain that we cannot retrieve keywords for. Please enter another domain.
Cannot return keywords for the domain.	You have likely entered a domain that we cannot retrieve keywords for. This could be part of a wider issue, please get in touch if the function continues not to work.