The type initializer for 'Microsoft.SharePoint.Client.ClientContextExtensions' threw an exception

[bGlasson]

Hi all,
I'm a powershell toddler with a (previously) working set of scripts using PnPOnline for bulk & batch sharepoint updates. Connect-PnPOnline with -UseWebLogin worked well with our SSO and life was good. Now I get:
Connect-PnPOnline : The type initializer for 'Microsoft.SharePoint.Client.ClientContextExtensions' threw an exception

Not clear what environment change might have caused this, what it's actually upset about or how to fix it. Any advice very welcome!

Note: other auth methods aren't an option as a vanilla user in my environment (I dont get normal access to user/pass credentials etc)... if there's another way to use simple SSO, would love to hear it too :)

[bGlasson]

Update:
Issue occurs with 1.11 and 1.12 and PS 5.1
Have since found examples of

• users like me that fail with PS5.1 above, but succeed (no error) with 7.3
• users that can't replicate the issue with 1.11 + PS5.1

Still curious to why this happens (seemingly inconsistently)... but the panic urgency is gone now I've got a workaround.