Merge profiles not working

Monica Ross_1

I have tried to merge these profiles several times over the past few days LZKF-NHF and PXJG-S6B.

The 2 profiles are suggested as duplicates. She did marry Alexander Young. PXJL-XH4, who is also duplicated.

They had several children including 93KW-LLD who is also duplicated as PXJL-6QN.

I get to the comparison page, check off all the relevant boxes and nothing happens.