# Courses.opencv.org is unavailable

**URL:** <https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994>\
**Category:** Site Feedback\
**Created:** [January 20, 2021, 9:39pm UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994 "2021-01-20T21:39:40Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![Roye](https://avatars.discourse-cdn.com/v4/letter/r/4da419/32.png) [@Roye](https://forum.opencv.org/u/Roye)\
**Post date:** [January 20, 2021, 9:39pm UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/1 "2021-01-20T21:39:40Z")

</div>

The main course site is unavailable.  
It gives the following error message:

# Your connection is not private

Attackers might be trying to steal your information from **[courses.opencv.org](http://courses.opencv.org)** (for example, passwords, messages, or credit cards). Learn more

NET::ERR\_CERT\_REVOKED

---

<div class="post-metadata">

**Author:** ![Nalin](https://avatars.discourse-cdn.com/v4/letter/n/ecd19e/32.png) [@Nalin](https://forum.opencv.org/u/Nalin)\
**Post date:** [January 20, 2021, 11:35pm UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/2 "2021-01-20T23:35:04Z")

</div>

Still not accessible. Expired certificate maybe.

---

<div class="post-metadata">

**Author:** ![crackwitz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/crackwitz/32/14_2.png) [@crackwitz](https://forum.opencv.org/u/crackwitz)\
**Post date:** [January 21, 2021, 1:48am UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/3 "2021-01-21T01:48:20Z")

</div>

my browser tells me `NET::ERR_CERT_REVOKED`

odd issue. I’m sure someone will eventually notice, when the stream of customers disappears 😃

---

<div class="post-metadata">

**Author:** ![spmallick](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/spmallick/32/8_2.png) [@spmallick](https://forum.opencv.org/u/spmallick)\
**Post date:** [February 25, 2021, 7:46pm UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/4 "2021-02-25T19:46:32Z")

</div>

Very sorry for not responding here. We should have closely monitored the forum at that time. Sorry about this.

---

<div class="post-metadata">

**Author:** ![Roye](https://avatars.discourse-cdn.com/v4/letter/r/4da419/32.png) [@Roye](https://forum.opencv.org/u/Roye)\
**Post date:** [February 25, 2021, 8:01pm UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/5 "2021-02-25T20:01:01Z")

</div>

I also sent a few days ago emails to course@opencv and got zero replies. Also tried to use the [course.opencv.org](http://course.opencv.org) Help form, but seems no one goes over them

---

<div class="post-metadata">

**Author:** ![Vikas](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/vikas/32/147_2.png) [@Vikas](https://forum.opencv.org/u/Vikas)\
**Post date:** [February 26, 2021, 3:45am UTC](https://forum.opencv.org/t/courses-opencv-org-is-unavailable/994/6 "2021-02-26T03:45:03Z")

</div>

Hi @Roye

The issue was there for about 10 hours and it got fixed after that.

I can see on our system your mail on Jan 21 and also see that it was replied to.

I can also see some of your other emails and all of them were replied as well. Please let me know if you think any of your emails were missed and I will check them out.