Error with Ardour 6.9 to initiate camomile plugin (VST and LV2)

[jeanmartin13]

1. Please provide an explicit title to the issue.
   On Ardour 6.9 on ubuntu 20.04 Ardour won't initiate cammile plugins

Hello, I think I did create the example plugins as described on the WIKI but after plugin scan on Ardour I have the following message :

[Info]: Scanning: /usr/lib/lxvst/camomile/Bulgroz.vst3/Contents/x86_64-linux/Bulgroz.so [ERROR]: Missing entry method in VST2 plugin '/usr/lib/lxvst/camomile/Bulgroz.vst3/Contents/x86_64-linux/Bulgroz.so' [WARNING]: Cannot open VST2 module '/usr/lib/lxvst/camomile/Bulgroz.vst3/Contents/x86_64-linux/Bulgroz.so' Scan Failed.