Facing multiple error:
1. Issue creation throws NullPointerException error
2. Clicking on a issue type on project setting tab gives error : "An error occurred while loading the page"
ava.lang.NullPointerException
java.lang.NullPointerException
at com.atlassian.jira.issue.fields.config.manager.IssueTypeSchemeManagerImpl.getIssueTypesForConfigScheme(IssueTypeSchemeManagerImpl.java:345) [classes/:?]
at com.atlassian.jira.issue.fields.config.manager.IssueTypeSchemeManagerImpl.getSubTaskIssueTypesForProject(IssueTypeSchemeManagerImpl.java:339) [classes/:?]
at jdk.internal.reflect.GeneratedMethodAccessor1783.invoke(Unknown Source) [?:?]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [?:?]
at java.base/java.lang.reflect.Method.invoke(Method.java:566) [?:?]