TypeError: 'NoneType' object is not subscriptable in __generate_result method

### Description
Hi,

I encountered an issue with the `deutschland` package while trying to fetch financial reports using the `Bundesanzeiger` class. When running my tests, I received a `TypeError` indicating that a 'NoneType' object is not subscriptable. This occurs in the `__generate_result` method when trying to access the `captcha_wrapper` div.

#### Error Details
```
TypeError: 'NoneType' object is not subscriptable
```

#### Steps to Reproduce
1. Initialize the `Bundesanzeiger` class.
2. Call the `get_reports` method with a valid search term.
3. Observe the error in the `__generate_result` method.

#### Code Snippet
Here is the relevant part of the code where the error occurs:

```python
def __generate_result(self, content: str):
"""iterate trough all results and try to fetch single reports"""
result = {}
for element in self.__find_all_entries_on_page(content):
get_element_response = self.__get_response(element.content_url)

if self.__is_captcha_needed(get_element_response.text):
soup = BeautifulSoup(get_element_response.text, "html.parser")
captcha_image_src = soup.find("div", {"class": "captcha_wrapper"}).find(
"img"
)["src"]
img_response = self.__get_response(captcha_image_src)
captcha_result = self.captcha_callback(img_response.content)
captcha_endpoint_url = soup.find_all("form")[1]["action"]
get_element_response = self.session.post(
captcha_endpoint_url,
data={"solution": captcha_result, "confirm-button": "OK"},
)

content_soup = BeautifulSoup(get_element_response.text, "html.parser")
content_element = content_soup.find(
"div", {"class": "publication_container"}
)

if not content_element:
continue

element.report = content_element.text
element.raw_report = content_element.prettify()

result[element.to_hash()] = element.to_dict()

return result
```

#### Additional Information
- Python version: 3.10.13
- `deutschland` package version: latest
- OS: macOS

#### Logs
```
2024-06-01 14:17:21 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchen2?4-1.-search~table~panel-rows-2-search~table~row~panel-publication~link HTTP/1.1" 302 0 (connectionpool.py:549)
2024-06-01 14:17:21 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchergebnis?7 HTTP/1.1" 200 None (connectionpool.py:549)
2024-06-01 14:17:21 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchergebnis?7--captcha~panel-captcha_form-captcha_image&antiCache=1717244241383 HTTP/1.1" 200 None (connectionpool.py:549)
2024-06-01 14:17:23 [DEBUG] https://www.bundesanzeiger.de:443 "POST /pub/de/suchergebnis?7-1.-captcha~panel-captcha_form HTTP/1.1" 302 0 (connectionpool.py:549)
2024-06-01 14:17:23 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchergebnis?9 HTTP/1.1" 200 None (connectionpool.py:549)
2024-06-01 14:17:23 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchen2?4-1.-search~table~panel-rows-3-search~table~row~panel-publication~link HTTP/1.1" 302 0 (connectionpool.py:549)
2024-06-01 14:17:23 [DEBUG] https://www.bundesanzeiger.de:443 "GET /pub/de/suchergebnis?10 HTTP/1.1" 200 None (connectionpool.py:549)
```

Please let me know if further information is needed.

Thank you!

Christian