Exceptions are thrown and Settings.xml and settings.json not updated after JSON RPC conversion

[roopa0222]

Describe the bug Exceptions are thrown when no validation rule is given for Project settings and User settings. I am using TPKJ project to update the Settings.xml. Notice that Settings.xml and settings.json are not updated with the given information on UI

To Reproduce Steps to reproduce the behavior: In my test extension I have Project Settings and Settings input with validation rules.

1. On Settings Test
2. Enter TestWhite in Settings Background Color (No Validation Rule) :
3. Notice that settings.json is not updated with "paranextExtTesting.backGroundColor_TC12":"TestWhite" at C:\Users{UserName}.platform.bible\data
4. See error message displayed in the console.

Similarly

1. Enter WhiteTest at ProjectSettings BackgroundColor (No Validation) :
2. Notice that Settings.xml is not updated with "paranextExtTesting.backGroundColor_projectSetting_TC13":"WhiteTest" at C:\Users{UserName}.platform.bible\projects\Paratext 9 Projects\TPKJ
3. See error message displayed in the console.

Expected behavior Settings.xml and settings.json must be updated without any exceptions. In case of Validation rule returns false, error must logged

Find the attachment for log file

main.log