Migrate 10.4.21 from 9.5.31 problem with extension "bootstrap_package_11.0.3"

Hi
With Typo3 V10.4.21 when I use the extension "problem with extension “bootstrap_package_11.0.3” I get the following error:

### (1/1) GuzzleHttp\Exception\ConnectException

cURL error 7: Failed to connect to 2607:xxxx:xxxx:xxx::xxxx: Network is unreachable (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)

Do you have a solution please?
Thank you