I've noticed that ever since upgrading to Illustrator CC 2018 (22.0.1) that the Warp Effect doesn't seem to work properly. The Arc and Arch effects will work, but applying any of the Flag, Wave, Fish or Rise effects won't change the object at all.9 votes
Thank you to all who shared their files. We do not support flag, fish effects on a straight line with just two anchor points. The feature is implemented to work on the line segment which is not straight.
Please refer to the attachment for supported and non supported scenarios. Should you have further query please email us on email@example.com
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