# Web Sdk black screen

**URL:** <https://devforum.zoom.us/t/web-sdk-black-screen/11354>\
**Category:** Web\
**Created:** [April 5, 2020, 6:58pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354 "2020-04-05T18:58:52Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![NKSM](https://avatars.discourse-cdn.com/v4/letter/n/258eb7/32.png) [@NKSM](https://devforum.zoom.us/u/NKSM)\
**Post date:** [April 5, 2020, 6:58pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/1 "2020-04-05T18:58:52Z")

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Hallo,

I get a black screen, no any errors in the console. Meeting ID: 726992269.

I am using https with self signed certificate.

What I am doing wrong? See screenshot for more info.

Please reply asap , thanks!

 ![Screenshot 2020-04-05 at 21.08.07](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/2X/8/8509ebf4aad80074294eb90d9a62820e50bd0751.png)

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**Author:** ![NKSM](https://avatars.discourse-cdn.com/v4/letter/n/258eb7/32.png) [@NKSM](https://devforum.zoom.us/u/NKSM)\
**Post date:** [April 5, 2020, 7:56pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/2 "2020-04-05T19:56:45Z")

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I added `ZoomMtg.preLoadWasm(); ZoomMtg.prepareJssdk();` in my code.

Now i get “Your connection has timed out and you cannot join the meeting. Verify your network connectivity and try again”.

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**Author:** ![tommy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/tommy/32/72769_2.png) [@tommy](https://devforum.zoom.us/u/tommy)\
**Post date:** [April 6, 2020, 5:56pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/3 "2020-04-06T17:56:35Z")

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Hey @hernandezbg,

Please see the latest Web SDK update here:

[https://marketplace.zoom.us/docs/guides/getting-started/stay-up-to-date/upcoming-changes/web-sdk](https://marketplace.zoom.us/docs/guides/getting-started/stay-up-to-date/upcoming-changes/web-sdk)

Thanks,  
Tommy

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**Author:** ![hernandezbg](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/hernandezbg/32/4946_2.png) [@hernandezbg](https://devforum.zoom.us/u/hernandezbg)\
**Post date:** [April 7, 2020, 8:53pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/4 "2020-04-07T20:53:24Z")

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> [@tommy](#):
>
> Please see the latest Web SDK update here:

Hey Tommy, I already updated a 1.7.4

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**Author:** ![michael\_p.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_p.zoom/32/18105_2.png) [@michael\_p.zoom](https://devforum.zoom.us/u/michael_p.zoom)\
**Post date:** [April 7, 2020, 10:53pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/5 "2020-04-07T22:53:28Z")

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Hi @hernandezbg,

Are you still seeing the error with 1.7.4? Are you using the CDN version of Local?

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**Author:** ![hernandezbg](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/hernandezbg/32/4946_2.png) [@hernandezbg](https://devforum.zoom.us/u/hernandezbg)\
**Post date:** [April 7, 2020, 10:57pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/7 "2020-04-07T22:57:48Z")

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Hi @michael_p.zoom In the thread [https://devforum.zoom.us/t/meeting-disconnected-trying-to-reconnect/11990](https://devforum.zoom.us/t/meeting-disconnected-trying-to-reconnect/11990) I explain it

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**Author:** ![michael\_p.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_p.zoom/32/18105_2.png) [@michael\_p.zoom](https://devforum.zoom.us/u/michael_p.zoom)\
**Post date:** [April 7, 2020, 11:19pm UTC](https://devforum.zoom.us/t/web-sdk-black-screen/11354/8 "2020-04-07T23:19:32Z")

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Hi @hernandezbg,

Thanks I’ll respond in the thread you just provided.