There is no problem when the applet is tested in the developer tool, but the following error is reported in the real device test, and the sending request fails.
Since there is no problem in the developer tool, the problem of wrongly written domain name is ruled out, and the development environment can run should be set to not detect legal problems.
After canceling the settings, run the developer tool again to see the following error.
And you can also see the error by putting the error request interface into the browser to run.
This confirms that it is a certificate issue. For me, it is caused by the inconsistency between the certificate and the domain name. Just put the new certificate on the server.