Unable to buid project - cannot convert undefined or null to object


I've hit an issue when Radzen closed unexpectedly. I reloaded Radzen and then the project, updated schema and clicked finish, rebuild throws error
I've tried reloading and rebooting but same issue. Other projects are OK.
Hope you can help me with this as have spent 4 days on the project to date!

[2019-11-28 14:54:13.204] [info] License check result: true
[2019-11-28 14:54:13.207] [info] Checking for update
[2019-11-28 14:54:13.893] [info] Update for version 2.32.3 is not available (latest version: 2.32.3, downgrade is disallowed.
[2019-11-28 14:54:25.543] [error] TypeError: Cannot convert undefined or null to object
at Function.keys ()
at Builder.exports.Builder.Builder.buildObject (C:\Program Files\Radzen\resources\node_modules\xml2js\lib\builder.js:44:19)
at Object. (C:\Program Files\Radzen\resources\node_modules@radzen\blazor-server\dist\merge-project.js:124:51)
at step (C:\Program Files\Radzen\resources\node_modules@radzen\blazor-server\dist\merge-project.js:32:23)
at Object.next (C:\Program Files\Radzen\resources\node_modules@radzen\blazor-server\dist\merge-project.js:13:53)
at fulfilled (C:\Program Files\Radzen\resources\node_modules@radzen\blazor-server\dist\merge-project.js:4:58)

Please send us your application to info@radzen.com. Delete the server\bin and server\obj directories to keep the file size smaller.

Thanks for quick response.