Visual Studio 2019 16.5.4 iOS Bundle Signing Error "Please wait until the provisioning information is loaded"

I am facing an issue with the provisioning for iOS quit working in Visual Studio(16.5.4)  and also the Apple Accounts management.
On the bunde signing properties I only get "Please wait until the provisioning information is loaded":

And under Options -> Xamarin -> Apple Accounts I get "Please wait until the local provisioning service is initialized":

How-I-fixed-it:

Deleting folder "%localappdata%\Temp\Xamarin\XMA" made it working again.

Also posted the question here:
https://developercommunity.visualstudio.com/content/problem/990441/xamarin-apple-accounts-please-wait-until-the-local-1.html

and here:
https://forums.xamarin.com/discussion/comment/409124#Comment_409124

How to extend or create a new a cer certificate for package signing or re-signing UWP for sideloading?

How to extend or create a new a cer certificate for package signing or re-signing UWP  for sideloading?

How-I-fixed-it?

1.  Lookup the CN (Publisher Name) from the old certificate (the new one needs to have the same CN) 
2. Command window in current dirctory of the appx
3. 1. Create a new certificate to self-sign you UWP app using the MakeCert in the Windows Kits SDK, e.g. "C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64\MakeCert" /n CN=YOUR_PUBLISHER_NAME  /r /h 0 /eku "1.3.6.1.5.5.7.3.3,1.3.6.1.4.1.311.10.3.13" /e "12/31/2100" /sv Test.pvk Test.cer
4. Convert the certificate to pfx format (using the password you entered when promted by the signtool), e.g. "C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64\Pvk2Pfx" /pvk  Test.pvk /pi "pwd" /spc Test.cer /pfx Test.pfx /po "pwd"
5. Sign the appx, e.g. "C:\Program Files (x86)\Windows Kits\10\bin\10.0.18362.0\x64\SignTool.exe" sign /fd sha256 /f "Test.pfx" /p pwd "FULL_PATH_TO_MY.appx"

Found the solution here:

https://blogs.msdn.microsoft.com/wsdevsol/2014/02/12/create-a-windows-store-appx-package-and-sign-it/

Windows Phone 8 Lumia 920 does not connect to company / university WLAN any more. Certificate issue.

I had my Lumia 920 WP8 phone connected to my company / university WLAN at KIT  (wkit-802.1x) for months without issues. A few days ago, it started to refuse to connect to the WLAN. It kept asking my for username and passwort and then just told me "Anmeldung nicht möglich" (german). I think the error message in english could be something like "Cannot connect" or "Could not connect to WLAN".

How-i-fixed-it:
The Problem seems to be caused by an issue with the root certificate the Network uses (Deutsche Telekom Root CA 2). I downloaded the certificate again as described on my university WLAN help page, sent it to myself by email and opened it on my phone. WP8 asked me to install the certificate and i confirmed.
After that, i tried to connect to WLAN again and it works!