It seems that there is a problem with the attributs and variations. We have used the plugin for almost a year. And every now and then we get the error : Please choose product options… – and the “Buy” – button is disabled.
We have found a way to fix this, but it would be great to not have this problem any more.
In the value field for attributs, every reservation is added. And the reservations also adds a new variations automatically. And then at some point it seems that the attributs and variations is full and we get – Please choose product options….
The quick fix is to delete every reservation both from attributs and variations.