So… I discovered this thread https://premium.wpmudev.org/forums/topic/products-page-gives-me-the-white-screen-of-death-php-memory-exhausted re the error I posted yesterday.
I did have a page in the trash called “products” so, I permanently deleted the trash. I saved the permalinks. I increased the memory to 128 and I’m STILL having an error.
Fatal error: Out of memory (allocated 61865984) (tried to allocate 16 bytes) in /home/xxxxxx/public_html/wp-includes/query.php on line 1398