Breast cell lines, drug sensitivity Pearson correlation by gene

Is this an issue with sample size?

I have used the Pearson correlation tool in the portal successfully for many different queries. For the first time it is not working when I look at the following:

Cell line selector → create group of all 92 cell lines with breast lineage

Custom analyses → Pearson correlation → 1. Data slice = gene → KMT2C → damaging mutations → 2. Portal data = Drug sensitivity (PRISM repurposing primary screen) → 3. Select subset of breast cell lines above

The following blank screen appears indefinitely

This has not been an issue with an identical query on a different (larger) subset of cell lines