I would like someone to advise me

I am using VBR 9.5U4 and I am running a replication job.
In order to use the Network Mapping feature, in the replication job configuration, I set the Activated "Network remapping".
Then, in the "Network" view, I tried to select the source network.
In the Source Network, click "Browse" and select the source ESXi host as Expanded.
However, "The given key was not present in the dictionary " error was output.
This error occurred and the Distributed Switch port group you want to select was not visible.
I am using a user with permissions that reside at the following URL
https://helpcenter.veeam.com/archive/ba ... sions.html
I rescan several times the vCenter registered to Veeam, but the problem was not resolved.
I would like to know why I'm getting this error and how to solve it.
Do you need to respond to the following blogs?
https://www.sysadmintutorials.com/veeam ... ictionary/
Kind Regards,
Asahi,
Climb Inc.