YouTube made a change that results in TubeBuddy not being visible on YouTube's Studio Classic. 

We have fixed the problem, however, the Google Chrome store needs to review it and publish it. 

In the past, the review has been done in hours. Now it takes over a week. Unfortunately, there is nothing we can do but wait for them to review and publish the change. Sorry for the inconvenience.

In the meantime, there are two workarounds.

  1. You can switch to using our Firefox extension (they published the fix).
  2. You can move to YouTube's Creator Studio. The link below has instructions on moving to Creator Studio.