How to recreate a Wordpress site

I am looking for a way to recreate the core parts of Wordpress.

When I try to use Elementor, I get a critical error. I have tried different themes, de-actived, deleted, and reinstalled plugins. Even deleted pages and posts both from WP and the wp_posts and metadata tables.

The theme that I prefer is OceanWP. It might have something to do with the problem as it showed up after I added a template to their Theme Panel. I have a question in to them. Elementor tells me it isn't their problem.

I have tried everything I can to get around the error including deleting themes, and the Elementor plugin.

I am desperate and think that my best approach would be to replace my current WP install. I rebuilt my localhost image by doing a fresh install. That was successful. I've thought about doing that on my staging site, but I have quite a few pages, posts, and media images that would require probably a month to recreate.

If I were to rename WP's base tables, reload WP, then delete the core table and rename them back to original would I have a chance to fix the problem or would I have just created a bigger problem?