v1.0.9: (For site doesn't use MSI) fix error: "We can't update the alert subscription right now"

QUESTION:

Since I don't MSI so that I install your module version 1.0.9 for my site M2.3.6.

However, there is an error when I add the email address and click to button Notify Me, it shows a message: "We can't update the alert subscription right now".

I go to the backend Manage Customer Subscriptions and see that the email was recorded.

ANSWER:

To fix this error, please edit file app/code/Bss/ProductStockAlert/Controller/Add/Stock.phpas below:

Or download the file attached and override the current files on your site.

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