I have setup a apache2 in ubuntu with SSL for proxying to my spring boot web application. There are 2 instances of spring boot web application running on 2 ports 8101 and 8111. when i put in in browser i get the following page

This is my 000-default.conf

This is my default-ssl.conf

Also i get this error in the apache error.log "ssl_stapling_init_cert: can't retrieve issuer certificate!" I can set the SSLUseStapling to off but i want it to be on and be working which will fasten my page access.

I have been trying to search google for a solution for these 2 problems but not been getting for whole day now.

The SSL keys are perfect i already checked it and it was working on older version of ubuntu. This started happening only when i upgraded ubuntu and i had to purge the apache totally and reinstall it and configure