Jetpack Problem

Hello all,
i have a problem with the jetpack connection.
When i try to connect my website with jetpack, i become the following error: Unable to insert blog. Please try again or contact support.
I have all topics read in the forum and test the solutions in the threads.
Nothing will work for me.
RPC test runs successfully, changing url won‘t work.

Need help.

Regards,
Joerg

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