Recently, we noticed that the certificate does not work correctly in some devices, the site https://www.whynopadlock.com/ displays the following error:
You have an invalid or missing intermediate (bundle) certificate. This may not break your padlock on all browsers, but will on others. Please contact your SSL Vendor for assistance with this error.
It seems that the intermediate certificate of let's encrypt is no longer valid, I checked , it will expire in March 2021
Please can you give me a valid let's encryp intermediate certificate?
I thank you in advance.