ASM failed to convert character unicode

Unicode U+2019 is referred to as 'right single quotation mark': https://www.compart.com/en/unicode/U+2019 and that one percent encodes to %92 per the ASCII table: http://www.ascii-code.com/. This one isn't considered to be unicode, if the application encoding language used by the ASM policy is UTF+8. As a result of this, when ASM gets the percent encoded request and tries to decode %92, it isn't able to do it for this application language. This results in the "Failed to convert character" violation.

Recommendation would be to use a different application language or to continue having the blocking setting disabled for this violation.