Issue	What it means
Authorization is required to perform that action.	This sometimes happens when you enter your licence key. It’s because you’re logged into multiple Google accounts, and need to be logged into one to use Keywords in Sheets.
Unknown function.	You might see this error if you haven’t opened the sidebar. If have already opened the sidebar, try cutting and pasting the function, changing a parameter in the function, or refreshing the sheet.
Exceed maximum execution time.	This error means the function has timed out. Google has a 30 second limit on all custom functions. Your output data will be saved in a cache for 7 hours, so if you cut and paste your function, it will return your data without using any credits.