Problems with AU units in Logic Pro X

[Triscelion]

I have the same problem with 4 AUs in Logic Pro X 10.4.3 under MacOSX 10.13.6. They all return the same result when I try to rescan them in Plugin Manager:

updating properties of AU plugin name by Synapse…FAILED!

The plugins are: Dune, DUNE 2.6, Legend, and Legend FX. Others from you work fine.

I have reinstalled them with no better result. Please help me rectify this.

In anticipation of a fix,

Triscelion

[Triscelion]

I can now add the recently bought DUNE 3 to the list of problematic plugins, and that the same applies to Reason. In Reason (latest update) all your Rack Extensions work, but not the VSTs.

This is all very confounding.

As ever,

Triscelion