Can you take a pic of the whole cactus including the top and roots? I have a sneaky suspicion the roots aren’t doing their job.

I suspect that picture is of the roots, there arent any. And its pretty shrivaled, personally, I'd toss it.

Now I can see the whole pic. Before I could only see a part of it.

Let the cactus callus over for a week or two on a paper towel in a dry shady area. Once it has formed a scab. You can repot in 60% perlite or pumice and 40% cactus mix. No water or strong sunshine till roots form. Which can take a month+ easily. This is a good time to do this, assuming you live on the northern hemisphere.

Be patient and no lifting to check for roots because it slows the process down, and you can potentially break off fresh roots.

There may not be enough life left in the cactus to throw out roots, looks pretty thirsty. But it did make a flower;). Crazier things have happened.

Once it becomes rooted you can begin to water and acclimate to stronger light.

Not sure what happened. Either the mix was too wet and the cactus’ roots rotted or too dry for too long and the cactus’roots disintegrated. Which I’ve had happen to three cacti. The most likely scenario is too wet for too long.

Thank you so much for your reply. I will definitely follow your suggestion.

Emily