Semantic model refresh Data source error: The PostgreSQL source doesn't support encrypted connection

What encryption option did you use when setting up your gateway connection? It sounds like you chose the "encrypted" option when your server does not support that

 

 

Hi,d_gosbell ,thanks for your concern about this issue.

Your answer is excellent!
And I would like to share some additional solutions below.

Hello,HMZ_PBIX .I am glad to help you.
I think d_gosbell's suggestion is helpful
Have you set up a gateway connection for the PostgreSQL sources in the power bi service. If you are using a gateway, in the gateway connection you can see that you can set the data source to be unencrypted, some users have mentioned that if you need to ensure that the data source is encrypted then you need to set up the SSL certificates correctly according to the Microsoft requirements.
Until then I would recommend that you try setting No Encryption first (either in Power BI Desktop or Power BI Service), check that you can create the gateway connection and refresh the report properly in your environment, and then consider the encryption issue later.
powerbi - Power BI Service - Unable to refresh a postgresql source which doesn't support encrypted connections - Stack Overflow
In the official documentation, it is recommended to give preference to the unencrypted option in the official connection cases (selected when connecting to the data source in power bi desktop).
You need to use NpgSQL and configure the relevant parameters.

I've tried configuring the power bi service gateway connection for PostgreSQL sources and the report refreshes successfully in the service, so hopefully this issue will help you. (This covers the process of making my pbix file to finally refreshing it in service)
URL:
Error connecting Postgres with Gateway - Microsoft Fabric Community

Settings in Power BI Desktop

Settings in Power BI Service(use gateway)

 

I hope my suggestions give you good ideas, if you have any more questions, please clarify in a follow-up reply.
Best Regards,
Carson Jian,
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.