I had this working a few days ago but I deleted and remade a blueprint of a spline mesh. Now there’s a purple uneditable spline in the viewport so I can’t actually create/manipulate spline components. Struggling to find info on google of what causes this.
https://cdn.discordapp.com/attachments/221798862938046464/816200840452898846/unknown.png
Have you tried to tick the “Override Construction Script” under Spline tab of the Blueprint?
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In order to fix this issue. While the spline is in purple. Select the Spline component inside the Actor, then in the details panel you will find an option called “Override Construction Script” when you check this, it will automatically turn into white, which will allow you to manipulate your points
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