Help with White Screen of Death

Hello – need paid assistance in solving a wsd on a Drupal Commerce site that I cannot fathom at all. Site working OK until we upgraded MySQL from 5.55 to 5.6.36. Most of the site still works but we get wsd on the product maintenance screen. No php error but a couple of apparently runaway MySQL queries are showing up.

Cheers

Drupal version: 


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