The certificate file could not be parsed; What should I do if the digital certificate fails to sign?

When using the certificate, the system will prompt:

The certificate file could not be parsed; Digital certificate signing failed. When reinstalling the certificate environment, follow these steps.

Step 1: Set up Abreu. As a trusted site.

A, open the browser-tools-Internet option, as shown in the following figure:

B on the security tab, select a trusted site, click it and add it, as shown below:

Step 2: Adjust the security level of the browser.

In Browser Tools-Internet Options-Security? Adjust the customization level to medium or low, and then click OK;

Step 3: Download the latest digital certificate application environment;

Download address digital certificate application environment. Rar, unzip after downloading, double-click the file and install the certificate environment.

Step 4: Log in normally after installation, re-import the certificate, and log in with the certificate after exit.