CefSharp will not display the following web page: https://wa.me

[Plegin]

Using CefSharp.WinForms v104.4.240 in a C# project VS2019

I am browsing to https://wa.me like this: browser.LoadUrl("https://wa.me");

I see a brief flash of the webpage contents and then the browser shows blank contents.

This happens with x86 and x64 config.

In Chrome, this web page remains showing.

Is there any way to solve this?

[amaitland]

Likely there was an error, see #4232 (comment) to get started debugging.

[Plegin]

OK. I have followed the advice in the trouble shooting guide. I now initialise Cef and turn off GPU acceleration.
But the issue persists.

The DebugLog is this:

[0907/141555.553:ERROR:component_installer.cc(354)] Failed to read manifest or verify installation for Widevine Content Decryption Module (C:\Users\nrpsu\AppData\Local\CEF\User Data\WidevineCdm\4.10.2391.0).: The system cannot find the path specified. (0x3)
[0907/141604.985:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/yH/r/c_1vdG88uNh.woff2' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141604.985:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/yN/r/KKlOyJQcRfr.woff' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141604.987:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/yR/r/RuiWHQ9HuZ-.woff2' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141604.987:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/ya/r/5vZjyJccuEw.woff' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141604.988:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/yU/r/zSaFQ46AO2w.woff2' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141604.988:INFO:CONSOLE(29)] "Refused to load the font 'https://static.whatsapp.net/rsrc.php/yR/r/_gCoI-iROin.woff' because it violates the following Content Security Policy directive: "font-src data: https://.fbcdn.net".
", source: https://api.whatsapp.com/ (29)
[0907/141607.014:WARNING:frame_impl.cc(461)] SendProcessMessage sent to detached frame 17179869185 [4,1] will be ignored

The path exists on my PC and it includes a manifest file and other files and folders:

Any ideas how I can resolve these errors?

[amaitland]

OK. I have followed the advice in the trouble shooting guide. I now initialise Cef and turn off GPU acceleration.

Did you add a LoadError event implementation as I suggested? What you are describing is unlikely a GPU acceleration issue.

[Plegin]

The Load error is: Failed to load URL whatsapp://chat/ with error ERR_UNKNOWN_URL_SCHEME (UnknownUrlScheme)

[amaitland]

Duplicate of #4232