Embarcadero just released a patch for RAD Studio 10.3.3 for a problem caused by a regression in our copy of the Indy library and related to Indy servers on the Windows platform as they load SSL certificates. The issue was reported on Quality Portal as RSP-27144.
The patch is available for download at https://cc.embarcadero.com/item/30906 .
The patch includes source code and compiled artifacts (DCU, packages) and can be installed unzipping its content in the RAD Studio main folder, as explained in the readme file included in the patch ZIP file.