Does it mean that i should use his classes in backend?
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.time.DateUtils
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1305)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1157)
… 42 more