Power BI Report Server Licensing

Hello,
I have difficulties publishing my first Power BI report.

When I click on "Need a Power Bi account. Try for free" I receive:
"We can't finish signing you up.
It looks like Microsoft Power BI isn't currently available for your work or school.
".

Here is the steps:
https://powerbi.microsoft.com/en-us/get-started/

Click on TRY FREE under
POWER BI
Cloud collaboration and sharing
I am getting:
Sorry...
We can't finish signing you up.
It looks like Microsoft Power BI isn't currently available for your work or school.
OK, got it

How can I publish my report?

Thanks !