ISSUE:
It seems that grouped products cannot be added to cart when enabling the Ajax Add to Cart module:
- Grouped products: https://www.loom.com/share/cdf5202faeb64f85ab61c3da6432edf2
- Grouped product with custom options: https://www.loom.com/share/f894a6ce9a434b2d96bb273f215efb7e
SOLUTION:
The module is not working properly with grouped products.
To resolve the issue, please edit the file app/code/Bss/AjaxCart/Controller/Index/Index.php:

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