Is there a way to fix this error other than having to reinstall something on the server (per this thread?
I host on NearlyFreeSpeech.net and don’t have the ability to reinstall anything. I tried to suppress the error in wp-config but that didn’t work. I just bought the theme and it is unusable for me with this error.
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About this issue can you tell us more detail what file cause this issue.
Because this is server issue so we can’t do anything.
However you can use this plugin to create a backup of your site.
I contacted the host and they are of the opinion this is a developer error (specifically with the required lessphp plugin). I am inclined to believe NFS since lessphp development seems to have stalled for the last two years (if the wordpress support page is any indication: https://wordpress.org/support/plugin/lessphp/)
NSF is a great host for me so I do not want to move. Is there a way to request a refund for the theme?