Can't reach licence server with proxy

Hello,

We are using DesignSpark since a long time. Our IT infrastructure change and now we are behind a proxy where our IT allow access both above url :

https://tools.designspark.com/designspark/api/tools/licenses
https://api.licensespring.com/

But we still get the error message :

They also make a rule for my computer to open queries from my computer but nothing has changed.

They ask me to contact the support of Designspark PCB to make a meeting about our issue but I can only have access to the forum.

Does someone know if the Licence server disable some range of ip address ? or someone know how to reach the support easily ? Or Does someone have an idea about our problem ?

Thanks in advance !