Hi lcrmj,
thanks for the info! I could only guess now that your problem may be related to the support request that was raised few weeks ago.
1) Inner exception is probably SecurityVerificationException.
2) Your client uses version of the .Net 4.5 with well-known bug.
Description of the problem and the hotfix can be found here.
https://support.microsoft.com/en-us/help/2748645/an-update-is-available-for-the-net-framework-4-5-in-windows-7-windows
More info about problem.
https://elegantcode.com/2012/08/23/net-4-5-operation-could-destabilize-the-runtime-yikes/
thanks for the info! I could only guess now that your problem may be related to the support request that was raised few weeks ago.
1) Inner exception is probably SecurityVerificationException.
2) Your client uses version of the .Net 4.5 with well-known bug.
Description of the problem and the hotfix can be found here.
https://support.microsoft.com/en-us/help/2748645/an-update-is-available-for-the-net-framework-4-5-in-windows-7-windows
More info about problem.
https://elegantcode.com/2012/08/23/net-4-5-operation-could-destabilize-the-runtime-yikes/