Samba update 4.10.16-15 does not seem to work

Hi,
Last night Samba was updated to 4.10.16-15 in my Community machine. Today I realize that my windows 10 clients cannot reach flexshares or print to the printers connected to the cups server. I think something is broken with Samba.

I am using "simple networking"

In my Windows 10 client I get "RPC protocol error" message whenever I try to reach a flexshare or try to print. In the samba log I get messages like this for each attempt from my Windows client:


The "Bad character push conversion with flags" looks "interesting". Note that my Win 10 clients uses Swedish setup (but my flexshares and printers use the normal english alphabet only)

Anyone that experience this too or know what to do?