- CKeditor module 7.x-1.13
- CKeditor 4.1
- Panels 7.x-3.3
- Browser: I have used Chrome and Firefox (newest versions)
If I reload the complete site, the editor appears again for the first time.
In the issue queue of WoltLab a similar problem (with the same error message) was posted: https://github.com/WoltLab/com.woltlab.wcf.user/issues/153
Maybe it helps to identify the specific error.