plugins undefined symbol

[PaulPiko]

Did you remove old plugins and use versions compatible with the Rack build?

Rack development blog

Note: After installing a beta or git build of Rack, if you wish to update to a newer version of Rack, you must delete the old installation folder and user folder. (See Where is the “Rack user folder”?) In-place updates from beta or git builds of Rack are not supported by VCV and will likely cause crashes or bugs if the above suggestion is not followed.