Do you know how to get rid of the issue?
Now, read this post fromMiniToolto find the solutions.
This is because your surfing app can adjust some policies or parameters.
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What is Mozilla Thunderbird?
How to download Thunderbird and install/uninstall it on your Windows/Mac?
This post provides a full guide for you.

Now, lets see how to fix the issue.
Step 1: First, kick off the Firefox web client and tap on the message.
Under this key, theImportEnterpriseRoots DWORDvalue will be displayed.
Therefore, to disable such policies, you should probably delete the registry key or its value.
Step 1: Open Microsoft Edge.
Now typeedge://policyand pressEnter.
To delete the policy, simply delete the registry value.
If you come across the same error, try these solutions.
If you have any different ideas to fix it, you could share them in the comment zone.