Hi,
Between the 28th March and the 2nd April, the following error has been thrown every time we try and preview our Power Page. It was working as expected after the last known change was made but during the time off this error has occurred.
We have tried to restart the page, move the page to another environment using PowerShell (which throws errors) and Solutions (which worked, but the resulting page was unusable for different reasons in the target environment).

I'm posting this in the vein hope that someone may have an idea to resolve this issue that won't require us to rebuild the whole solution. If this is not something that can be resolved without needing a manual rebuild, I think we may need to reconsider using Power Pages for important developments in the future.
If anyone could help this would be greatly appreciated. Thank you.