Appian not started with SafeRetryException

Hi!

I installed Appian locally for demo purposes, got a temporary license, but JBoss failed to start Appian with the following exception. I can’t get any way to fix it from the exception itself, can you advise what can be wrong?

Caused by: com.appiancorp.kougar.driver.exceptions.SafeRetryException: Unable to acquire a Read connection. Safe to retry.
at com.appiancorp.kougar.driver.pooling.concurrent.Semaphore.acquireConnection(Semaphore.java:435) [appian-kougar-driver.jar:]
at com.appiancorp.kougar.driver.pooling.concurrent.ConcurrentPools.getReadConnection(ConcurrentPools.java:145) [appian-kougar-driver.jar:]
at com.appiancorp.kougar.driver.pooling.PoolManager.getReadConnection(PoolManager.java:322) [appian-kougar-driver.jar:]
at com.appiancorp.kougar.driver.KougarConnection.getConnection(KougarConnection.java:147) [ap...

OriginalPostID-270558