I copied the symless directory and the symless.py to /opt/idapro-8.4/plugins, and then when I launch IDA Pro I get the following error, and there is no "symless" entry in the "Edit" -> "Plugins" menu.
/opt/idapro-8.4/plugins/symless.py: undefined function __plugins__symless.PLUGIN_ENTRY
I copied the symless directory and the symless.py to /opt/idapro-8.4/plugins, and then when I launch IDA Pro I get the following error, and there is no "symless" entry in the "Edit" -> "Plugins" menu.