500 Internal Server Error nginx/1.25.0 - was running fine

Been running nextcloud fine till it didnt. I’ve made no config changes. I think it was a cert renewal error. End result is a 500 Internal Server Error nginx/1.25.0. I have taking docker down, removed/pruned networks/containers/images etc then ran a docker-compose up -d which did not fix the error. I have run sudo apt update/upgrade on the debian box. I am pulling a jwilder/nginx-proxy:alpine and a label of com.github.jrcs.letsencrypt_nginx_proxy=true
The letsencrypt image is jrcs/letsencrypt-nginx-proxy-companion and also a mariadb image.

I don’t know where to start trouble shooting or where to look for which log and what to look for in that log. Any help would be greatly appreciated. Thank you

For internal server errors, you might want to check the webserver logfiles. After certificate update, you can also try to restart the webserver (not sure if that is within your docker container).