Does the message “Internal Datasource error: Maximun quota exceeded” appear while you were using Dataslayer.ai?
This error comes from the data source, it is not a Dataslayer error. This error usually appear with Google Analytics, Google Search Console and YouTube data sources.
If you have been using your data source account to get a lot of data from another platform ( like Data Studio or the proper data source) it may have reached the data source quota limit. That is what this error is saying. Most of the times, you just need to wait a little, try again and it should let you make the query.