If the installation still fails after configuring Fiddler to Clear Certificates on Exit, I recommend trying to manually install the certificate. See the steps below for how to do this.
Step 1 - Disable the Clear Certificates on Exit which was previously set.
Step 2- Use the Actions Button to Export Root Certificate to Desktop as shown in the below screenshot.
Step 3 - Run certmgr.msc, then drag and drop the certificate into the User's Trusted Root Certification Authorities folder as shown in the below screenshot.
Please give this a try and let me know if you need any additional information. Thank you.
Eric R | Technical Support Engineer
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Feedback Portal
and vote to affect the priority of the items