NPE on consecutive blank lines in end of file with class without body

[Kantis]

Expected Behavior

Ktlint should report an error of no-consecutive-blank-lines violation

Observed Behavior

NPE

~/workspace > vim dummy.kt                                                                                                                                                                                                                                                                                                                                                                                             48s 16:32:07
~/workspace > ktlint dummy.kt                                                                                                                                                                                                                                                                                                                                                                                           5s 16:32:18
dummy.kt:1:23: Internal Error (rule 'standard:no-consecutive-blank-lines') in dummy.kt at position '1:23. Please create a ticket at https://github.com/pinterest/ktlint/issues and provide the source code that triggered an error.
com.pinterest.ktlint.rule.engine.api.KtLintRuleException: Rule 'standard:no-consecutive-blank-lines' throws exception in file 'dummy.kt' at position (1:23)
   Rule maintainer: KtLint
   Issue tracker  : https://github.com/pinterest/ktlint/issues
   Repository     : https://github.com/pinterest/ktlint
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext.executeRule(RuleExecutionContext.kt:64)
	at com.pinterest.ktlint.rule.engine.api.KtLintRuleEngine$lint$3.invoke(KtLintRuleEngine.kt:100)
	at com.pinterest.ktlint.rule.engine.api.KtLintRuleEngine$lint$3.invoke(KtLintRuleEngine.kt:99)
	at com.pinterest.ktlint.rule.engine.internal.VisitorProvider$visitor$3.invoke(VisitorProvider.kt:46)
	at com.pinterest.ktlint.rule.engine.internal.VisitorProvider$visitor$3.invoke(VisitorProvider.kt:44)
	at com.pinterest.ktlint.rule.engine.api.KtLintRuleEngine.lint(KtLintRuleEngine.kt:99)
	at com.pinterest.ktlint.cli.internal.KtlintCommandLine.lint(KtlintCommandLine.kt:542)
	at com.pinterest.ktlint.cli.internal.KtlintCommandLine.process(KtlintCommandLine.kt:467)
	at com.pinterest.ktlint.cli.internal.KtlintCommandLine.access$process(KtlintCommandLine.kt:64)
	at com.pinterest.ktlint.cli.internal.KtlintCommandLine$lintFiles$3.invoke$lambda$0(KtlintCommandLine.kt:416)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.NullPointerException: Cannot invoke "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getElementType()" because the return value of "org.jetbrains.kotlin.com.intellij.lang.ASTNode.getTreeNext()" is null
	at com.pinterest.ktlint.ruleset.standard.rules.NoConsecutiveBlankLinesRule.isBetweenClassAndPrimaryConstructor(NoConsecutiveBlankLinesRule.kt:65)
	at com.pinterest.ktlint.ruleset.standard.rules.NoConsecutiveBlankLinesRule.beforeVisitChildNodes(NoConsecutiveBlankLinesRule.kt:30)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext$executeRuleOnNodeRecursively$1.invoke(RuleExecutionContext.kt:93)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext$executeRuleOnNodeRecursively$1.invoke(RuleExecutionContext.kt:92)
	at com.pinterest.ktlint.rule.engine.internal.SuppressHandler.handle-dhiVX_g(SuppressHandler.kt:28)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext.executeRuleOnNodeRecursively(RuleExecutionContext.kt:92)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext.access$executeRuleOnNodeRecursively(RuleExecutionContext.kt:29)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext$executeRuleOnNodeRecursively$2$1.invoke(RuleExecutionContext.kt:100)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext$executeRuleOnNodeRecursively$2$1.invoke(RuleExecutionContext.kt:99)
	at com.pinterest.ktlint.rule.engine.internal.SuppressHandler.handle-dhiVX_g(SuppressHandler.kt:28)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext.executeRuleOnNodeRecursively(RuleExecutionContext.kt:99)
	at com.pinterest.ktlint.rule.engine.internal.RuleExecutionContext.executeRule(RuleExecutionContext.kt:61)
	... 13 more

Steps to Reproduce

1. Create a file with just :

sealed class Hello

2. run ktlint on the file

Your Environment

• Version of ktlint used: 0.49.0
• Relevant parts of the .editorconfig settings: None
• Name and version (or code for custom task) of integration used (Gradle plugin, Maven plugin, command line, custom Gradle task): CLI
• Version of Gradle used (if applicable): N/A
• Operating System and version: MacOS