Import with noscript: Unable to import Betty Bossy (CH)

Description
Trying to import some recipes from website but not working !

Reproduction

1. Go to website Betty Bossy to select a recipe for example that one: https://www.bettybossi.ch/fr/Rezept/ShowRezept/BB_SCSC160101_0136A-20-fr?WT.mc_id=snl_bettykocht_210719_f&utm_source=emarsys&utm_medium=email&utm_campaign=snl_bettykocht_210719_f&sc_src=email_9395578&sc_lid=469723034&sc_uid=6uojPGZIec&sc_llid=7715&sc_customer=27471380810&title=Nouilles+aux+haricots+verts+et+pesto
2. Paste URL of recipe into Import URL field of Cookbook
3. Click OK
4. After end of process silent popup and no import done

Expected behavior
Import properly the recipe as the website follows the schema.org for recipes (have validated by checking myself with online validator tool of schemas.org). Had success with other websites in the past.

Actual behavior
Just display the empty popup (see below) and then you get back at Cookbook unchanged.

Screenshots

Browser
Netscape 90.0 64bits in Ubuntu 20.04

Versions
Nextcloud server version: 21.0.3
Cookbook version: 0.8.4
Database system: MySQL

Thanks

Vincèn

Start at the Cookbook Import URL field and reproduce the failure with the Betty Bossy recipe URL from the report. Inspect how the importer handles schema.org recipe data and the silent empty popup. Done means the recipe imports successfully and the popup no longer returns the Cookbook unchanged.