Intermittent error while refreshing Mysql data

Hello,

i have configured a refresh schedule of my data model linked to a Mysql istance to be execute from 8:00 to 00:00 every hour.

Sometimes i get this error:

DataSource.Error: An error happened while reading data from the provider: 'One or more errors occurred.'. Microsoft.Data.Mashup.ErrorCode = 10434. DataSourceKind = MySql. DataSourcePath = xxx. . The exception was raised by the IDbCommand interface. Table: xxx

It happens more or less two times a day, sometimes more:

The license used is PPU and if i try to update from Desktop app when from Web doesnt work, it works well.

Do you have any suggestion for how to fix it or how to debug better? "One or more errors occurred" doesn't help a lot.

Thanks a lot.