The workspace contains some nodes that are not properly configured

Don't rush to delete or modify anything.

I see that property z value is 0. That's the flow id it should be bounded but by all means this is wrong value.
I think it's reasonable to ask a little help from leaders. @knolleary

You can share the entry properly by copy your flows.json content into some online JSON formatter, let it format to be readable and save result as separate file just for case. Then you can share meaningful parts of it as proper input for investigations if needed. If such kind of issues happen it is good to find root cause and probably fix it. For brighter future for all of us.