Looking at the server log again,
The root cause is this NoSuchMethodError:
Caused by: java.lang.NoSuchMethodError: com.sun.org.apache.commons.beanutils.MappedPropertyDescriptor.clear()V
at org.apache.catalina.loader.WebappClassLoader.clearReferences(WebappClassLoader.java:1851)
Maybe someone from web team has some clue on this?
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