Scenario:

In the web environment, a request reports this problem, but other requests are normal. Open the F12 console and see the exception net:: err_HTTP2_PROTOCOL_Error 200 error

Troubleshooting:

Viewing the error.log report of nginx is that the permission of a temporary file is insufficient. The reason is that the account for starting nginx does not have operation permission in the previously reported directory

Solution:

1. Open the corresponding temporary directory to read and write permissions

2. Start nginx with the root account