[BUG] 404 error on frontend request with type=15551 in TYPO3 v13

[do-web]

Description

When using the extension in TYPO3 v13, the frontend throws a 404 error in the browser console for the following request:

https://my.site/?type=15551&tx_ipandlanguageredirect_redirect[browserLanguage]=de&tx_ipandlanguageredirect_redirect[ipAddress]=&tx_ipandlanguageredirect_redirect[referrer]=https%3A%2F%2Fmy.site%2F&tx_ipandlanguageredirect_redirect[languageUid]=0&tx_ipandlanguageredirect_redirect[rootpageUid]=1&tx_ipandlanguageredirect_redirect[countryCode]=&tx_ipandlanguageredirect_redirect[domain]=

The request method is POST, but it results in a 404 response.
TypoScript is correctly included from the extension.

Steps to Reproduce

1. Install and configure the extension in TYPO3 v13.
2. Open the frontend.
3. Check the browser console.
4. Observe the failing POST request with type=15551.

Expected Behavior

The request should be handled correctly and not return a 404.

Actual Behavior

The request returns a 404 error.

Environment

• TYPO3 version: 13.x
• Extension version: 13.0

Additional context

This issue might be related to the handling of the type=15551 request in TYPO3 v13.