you are using classic editor for this not the pdf certificate so please use pdf builder to build the certificate.
please make you have enable mandatory setting for pdf certificate. follow the tips:
tip regarding pdf certificate builder:
refer: https://wplms.io/support/knowledge-base/pdf-certificates/
https://www.youtube.com/watch?v=d9mXInbmFGY
https://www.youtube.com/watch?v=kyJGVlegWTc
https://www.youtube.com/watch?v=ylT1j35dUbg
https://wplms.io/support/knowledge-base/wplms-pdf-certificates-update-1-3/
make sure you have enabled all the latest version of plugins and theme on your site.
it's all the adjustments that you have did on your certificate.
let me clear
the steps for pdf certificate
- select the text box in pdf certificate builder choose the width and height accordingly
- drag and drop the element according to your design
- choose the alignment of the text there
- and after that click on the EDIT TEXT
- after that click save option
- now check it pdf and after assign to user