Thanks @re30067 for the problem report and for the hint how it can be fixed.
Sorry, for not answering earlier.
Meanwhile the code is different, and the product library does not use the OpenSearch class anymore.
But it is still used in the S1TBX to download GNSS orbit files.
@lveci can you check if the suggestion needs to be considered.
@oana_hogoiu can you have a look at it and check if the new product library works correctly.
@sentinel Have you experienced issues? What kind of problem? The problem can perhaps be solved in another way than by changing the code.