After installing WordPress i initially selected the OceanWP theme but then switch to Astra and i delete the OceanWP theme installation. Now, when visiting the site i get an error message saying…
Did you change the theme in the admin area as well? And also disabled any bundled plugins from that theme? Judging by the error message, your website is still trying to load some parts of that theme.
All i did was upload Astra Pro from the Dashboard > Plugins > Add new tab. Hit Network Enable and then Select the OceanWp theme and select Network Disable and then Delete. Want to make my site as light as possible to maximize its loading speed time.
My thoughts are that something might be wrong with those themes, or maybe how they were set up on your site. But I don’t know your site and themes, so I can’t help you.