Hello, this message pops up when you attempt to create the skillbook through fragments? Please let me know if you are still experiencing this issue.

I checked on my account, and had a few others check to ensure, it allowed us to use fragments by clicking the "Obtain skill book" *on, if you are still having this issue after clearing your cache, then please let me know, and I will let you know how to proceed.

Okay, please create a CS ticket and include the screenshots and description of what you are facing.

https://support-center.oasgames.com/?lang=en-us