Issue Migration & Transfer Manager error

[Ignacio Cerro]

When trying to migrate from one Plesk Onyx server to another, both same version number (17.0.17 Update #1), we get this error:

Failed to fetch configuration data from Plesk servers
Cause: 'NoneType' object has no attribute 'iter'
That is a critical error, migration was stopped.

Source server OS is CentOS 6.8, destination is CentOS Linux 7.2.1511.

We did one test with the source server not yet updated to Plesk Onyx, and that error message didn't appear.

 

[Aleksey Filatev]

Hello! It looks like an known issue PMT-3175. Could you please send me (via private conversation) debug.log file of your migration?