Thank you for your quick replies.
I have tried resetting the plugins and the theme on local. I found there were two plugins that I could not see from the dashboard. When also resetting the theme, these previously hidden plugins showed up and I could manually reset them. However, in the default theme, I do not have the ‘Data Management’ tab and don’t see the error. The local site does not functions as it should. Switching back to the previous theme, gives the same error again.
Would you recommend resetting the plugins/theme on the live site? As there’s no problem on the live site, I’m a bit reluctant changing anything there.