CWP to CWP Migration Not Working in Version 1.30.6

[Wonder]

Hello,

Since updating to CWP 1.30.6, the CWP-to-CWP Migration feature is no longer working. This issue did not occur in previous versions.

The problem occurs on servers running both AlmaLinux 8 and AlmaLinux 10.

1. CWP-to-CWP Migration displays a blank page

Opening the migration module from the CWP menu results in a completely blank page.

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index.php?module=cwp_to_cwp

The following error appears in the logs:

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PHP Fatal error: Uncaught Error: Call to undefined function cwp_admin_module_lang()

2. Alternative migration module fails

The alternative module can be accessed manually:

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index.php?module=cwptocwp

The Test Connection completes successfully, but clicking Next produces this error:

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Error Connecting: The destination server was not reached,
please check that the firewall is not blocking this request..!

At the same time, the following PHP warning appears:

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PHP Warning: Undefined array key "authentication"
in ajax_cwptocwp.php on line 0

SSH connectivity and authentication have been verified successfully. Ports 2304, 2031 and the configured SSH port are reachable.

Questions or doubt:

Does CWP-to-CWP Migration require any additional ports besides 2304, 2031 and SSH? If so, which ports and in which direction?

Thank you for your assistance!