Cannot find class in classpath in selenium

Question

[RemoteTestNG] detected TestNG version 7.4.0

org.testng.TestNGException:

Cannot find class in classpath: admin

at org.testng.xml.XmlClass.loadClass(XmlClass.java:75)

at org.testng.xml.XmlClass.init(XmlClass.java:67)

at org.testng.xml.XmlClass.<init>(XmlClass.java:54)

at org.testng.xml.TestNGContentHandler.startElement(TestNGContentHandler.java:576)

at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:518)

at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:183)

at java.xml/com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java:752)

at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1387)

at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2726)

at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:605)

at java.xml/com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:542)

at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:889)

at java.xml/com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:825)

at java.xml/com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)

at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1224)

at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:637)

at java.xml/com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:326)

at java.xml/javax.xml.parsers.SAXParser.parse(SAXParser.java:197)

at org.testng.xml.XMLParser.parse(XMLParser.java:39)

at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:16)

at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:9)

at org.testng.xml.Parser.parse(Parser.java:164)

at org.testng.xml.Parser.parse(Parser.java:250)

at org.testng.TestNG.parseSuite(TestNG.java:324)

at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:376)

at org.testng.TestNG.initializeEverything(TestNG.java:1011)

at org.testng.remote.support.RemoteTestNG6_12.initialize(RemoteTestNG6_12.java:22)

at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:98)

at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)

at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)