Sorry, my english is not good xD
I got too problems:
The option "Call Number" not working
When i receive a call, no notification popup appeared.
The versions i use: (Openfire 3.9.3, Spark 2.6.3, Asterisk 1.8.17)
First change config in manager.conf like
Try it, if does not work try changing asterisk-java api version
The current version in asterisk-im plugin es 0.3
The new version is 1.0 and works fine with asterisk 1.8
Download the last version from https://blogs.reucon.com/asterisk-java/ and replace the version in asterisk-im lib folder (/opt/openfire/plugins/asterisk-im/lib)
reload and try.