This has been a recurring issue that we've been unable to replicate or successfully troubleshoot in-house. The typical cause is that the view.json file in the file system has been wiped clean, resulting in something which can't be parsed as json. We're aware of the issue, but of the 23 forum threads (as of me writing this), no one has been able to provide a set of steps which can be used to replicate the issue. Internally, we've dug deep into the lifecycle of the resource and have so far been unable to identify anything that could cause the issue. If you can provide insight into what you were doing or last did to the View i question we would greatly appreciate it.
Also please provide what version of Ignition you are using, along with your operating system and version.