I am currently using Premier Pro CC 2018, and I cannot seem to use both warp stabilizer/ speed on the same clip. I understand that it will not let you unless you 'nest' the clip. however I have tried that, and it's still not working. Any tips?
As you mention they can not be used together, if it had to work on both clips if you separate the effects with the nesting function between them.
For you this procedure does not work?
Apply the speed to the clip,
Nest the clip,
Apply the warp to that nest (dont open).
Swear I tried that originally and it didn't work. But this time it did haha.