Hi Henry,
I acknowledge that it's a little strange that the log complain a ".so" file missing but it's there.
That may be caused by an error on file system or file properties(I mean with an executable access), not sure.
As I understand, your real concern is that the view client didn't show remote VM session as you want, and actually, it's not caused by the USB error.
Because our "MKS&VDPService" modules will do their routine business to initialize all plugins, and go on other jobs(like showing remote session) after some plugins failed.
My suggestions:
1. Switch protocols from PCoIP to BLAST or from BLAST to PCoIP, and have a try. Sometimes, they stuck.
2. Make sure you have a suitable DNS, and you can reach the agent machine from client.
3. Install view client with our bundle or tar package as the official document shows. If you DO want to "copy" directly, please use "-a" parameters to preserve the files' properties.
4. Include USB Redirection at the initial setup, and have a try.
If the issue still exists after these actions, please upload log files for troubleshooting if convenient.
Thanks.