Refresh powerbi online with SQL data base (RDS AWS)

I have set up a power bi. I have connected it with the rds database (aws). the report is published online. I have a problem with the update of the data. Every time I launch the update I get the following error message:

Guid must contain 32 digits and 4 dashes (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)

Can you help me to find a solution?

Thanks