We have a similar problem to this one.
In our language we use words with an orthographic accent, for example, the word family in my language is written like this: Família, with an orthographic accent on the letter i.
Many people put in the SSID of their wireless networks, words that contain spelling accents.
We have upgraded AnyConnect version 4.10.05085 to Cisco Secure Client version 5.0.03076 with the NAM module.
After this update, customers who have networks with an SSID that contains an orthographic accent, or @, #, cannot connect to the network.
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwd26172