10043: Layer's data source is an XY Event table
A layer in your map is using an XY event table as a data source, which can perform slowly in many situations.
Solutions
Do one of the following:
Review the draw metrics for this layer. If you are sharing the layer, review the data access metrics for the service.
Convert your event source to a file geodatabase, enterprise geodatabase, or query layer. See Migrate data for more information.
Additional information
XY event data sources are commonly used to draw point data originating from a data source that is not spatially enabled. In this respect, XY event data sources are a great way to integrate simple point data into your map. However, XY event sources cannot take advantage of the spatial indexing that makes spatial data sources perform well.
Consider converting the data to a spatial data source such as a file geodatabase or enterprise geodatabase. If the data resides in a relational database that cannot be geodatabase enabled, use the database's native spatial storage type and draw it with a query layer as an alternative.