Repository: yt-dlp
Issue: Unable to download webpage
Labels: question

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [x] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [x] I'm asking a question and **not** reporting a bug or requesting a feature
- [x] I've looked through the [README](https://github.com/yt-dlp/yt-dlp#readme)
- [x] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [x] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar questions **including closed ones**. DO NOT post duplicates
- [x] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)

### Please make sure the question is worded well enough to be understood

C:\Users\yansy\Videos>yt-dlp https://player.vimeo.com/video/https://vimeo.com/1049982889 --referer https://www.patreon.com/120676902
[vimeo] Extracting URL: https://player.vimeo.com/video/https://vimeo.com/1049982889
[vimeo] 1049982889: Downloading webpage
ERROR: [vimeo] 1049982889: Unable to download webpage: Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details. (caused by CertificateVerifyError("Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details.")); please report this issue on  https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using  yt-dlp -U

help me

### Provide verbose output that clearly demonstrates the problem

- [x] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [x] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [x] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```
[debug] Command-line config: ['--verbose', 'https://player.vimeo.com/video/https://vimeo.com/1049982889', '--referer', 'https://www.patreon.com/120676902']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2025.01.26 from yt-dlp/yt-dlp [3b4531934] (win_exe)
[debug] Python 3.10.11 (CPython AMD64 64bit) - Windows-10-10.0.26100-SP0 (OpenSSL 1.1.1t  7 Feb 2023)
[debug] exe versions: none
[debug] Optional libraries: Cryptodome-3.21.0, brotli-1.1.0, certifi-2024.12.14, curl_cffi-0.5.10, mutagen-1.47.0, requests-2.32.3, sqlite3-3.40.1, urllib3-2.3.0, websockets-14.2
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets, curl_cffi
[debug] Loaded 1839 extractors
[vimeo] Extracting URL: https://player.vimeo.com/video/https://vimeo.com/1049982889
[vimeo] 1049982889: Downloading webpage
ERROR: [vimeo] 1049982889: Unable to download webpage: Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details. (caused by CertificateVerifyError("Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details.")); please report this issue on  https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using  yt-dlp -U
  File "yt_dlp\extractor\common.py", line 742, in extract
  File "yt_dlp\extractor\vimeo.py", line 958, in _real_extract
  File "yt_dlp\extractor\common.py", line 962, in _download_webpage_handle
  File "yt_dlp\extractor\common.py", line 911, in _request_webpage

  File "yt_dlp\networking\_curlcffi.py", line 217, in _send
  File "curl_cffi\requests\session.py", line 679, in request
curl_cffi.requests.errors.RequestsError: Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details.

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "yt_dlp\extractor\common.py", line 898, in _request_webpage
  File "yt_dlp\YoutubeDL.py", line 4175, in urlopen
  File "yt_dlp\networking\common.py", line 117, in send
  File "yt_dlp\networking\_curlcffi.py", line 156, in send
  File "yt_dlp\networking\_helper.py", line 208, in wrapper
  File "yt_dlp\networking\common.py", line 340, in send
  File "yt_dlp\networking\_curlcffi.py", line 232, in _send
yt_dlp.networking.exceptions.CertificateVerifyError: Failed to perform, ErrCode: 60, Reason: 'SSL certificate problem: unable to get local issuer certificate'. This may be a libcurl error, See https://curl.se/libcurl/c/libcurl-errors.html first for more details.
```