Update of paperless-ngx stack not working

[Spiritreader]

2024-08-03 21:50:10	[ERR]:	(docker-update-manager.go:633):	Invalid request payload: 216. invalid character 'e' in string escape code

2024-08-03 21:50:10	[ERR]:	(docker-update-manager.go:583):	No operation performed: Invalid request payload: 216. invalid character 'e' in string escape code

Need to investigate the payload and figure out what is sent wrong.
My assumption is invalid escape characters as there is a json passed as env variable.