I have paid through fiverr and yes, I overpaid, because the transaction did not copy automatically (because of the wallet issue) the transaction data into the transaction for. So I had to copy manually and I did not notice that the price used a "," as a decimal sign instead of the "." that Electrum wants. So far they have still not reacted to my ticket.

This may have to do with the IT maintanance they did on Sunday. And now they are again on maintenance.