Inability to save or publish non-text blocks in Campaigns inline prompt

[plixels]

When trying to add a new inline prompt in Campaigns, I cannot save or publish any non-text blocks. I can only publish with text blocks such as a paragraph or the Newsletter Subscription Form block.

Error Message
I receive the error "403" on /wp-json/wp/v2/newspack_popups_cpt/162281?_locale=user.

I also get the "Updating failed. The response is not a valid JSON response." message inside of the editor.

Log:

"WordPress database error Table 'mysite.wp_newspack_campaigns_readers' doesn't exist for query SELECT * from wp_newspack_campaigns_readers WHERE client_id = 'fdbf0x72je0h' made by include('plugins/newspack-popups/api/campaigns/class-maybe-show-campaign.php'), Maybe_Show_Campaign->__construct, Lightweight_API->get_reader"

Steps to Reproduce

1. Go to Newspack->Campaigns
2. Click Add New Prompt
3. Create a new inline prompt.
4. Try to add a non-text block, such as an image or a button.
5. Save as a draft or publish the block.
6. Observe the error message.

Environment
WordPress version: 6.1.1
Newspack Theme version: 1.13
Newspack version: 1.100.0
Newspack Campaigns version: 2.11.0

Note: This somehow works on our dev environment after being cloned from live.

We do have a newspack-popups-config.php in wp-content, edited with the correct details from wp-admin.php

I also noticed that popups.js does NOT load on the live version but does on the dev version when creating a new prompt.