3064592 - com.sap.portal.desktop.DesktopService:getDesktop Cannot get desktop - Guest - PermissionControlException: Access denied

The following error can be found repeated several times on defaultTrace files:

#2.0#2021 05 21 12:14:15:282#+0200#Error#com.sap.portal.desktop#
#EP-PIN#com.sap.portal.common#C0000AAB583C1BDE0000000101880022#122868950000000004#sap.com/irj#com.sap.portal.desktop.DesktopService:getDesktop  Cannot get desktop#Guest#0##4BBF17D1BA1D11EBC7D200000752D4D6#498fae87ba1d11eb969500000752d4d6##0#Thread[HTTP Worker [@1418295983],5,Dedicated_Application_Thread]#Plain##
Desktop URL: <PCD_PATH_TO_PORTAL_DESKTOP>
[EXCEPTION]
com.sapportals.portal.pcd.gl.PermissionControlException: Access denied (Object(s): <PCD_PATH_TO_PORTAL_DESKTOP>)
at com.sapportals.portal.pcd.gl.PcdPersContext.filteredLookup(PcdPersContext.java:792)
at com.sapportals.portal.pcd.gl.PcdPersContext.deepFilteredLookup(PcdPersContext.java:619)
at com.sapportals.portal.pcd.gl.PcdFilterContext.filterLookup(PcdFilterContext.java:489)
at com.sapportals.portal.pcd.gl.PcdProxyContext.recursiveLookup(PcdProxyContext.java:2086)
at com.sapportals.portal.pcd.gl.PcdProxyContext.proxyLookupLink(PcdProxyContext.java:2189)
at com.sapportals.portal.pcd.gl.PcdProxyContext.proxyLookup(PcdProxyContext.java:2125)
at com.sapportals.portal.pcd.gl.PcdProxyContext.lookup(PcdProxyContext.java:1843)
at com.sapportals.portal.pcd.gl.PcdGlContext.lookup(PcdGlContext.java:120)
at com.sapportals.portal.pcd.gl.PcdProxyContext.lookup(PcdProxyContext.java:1824)
at com.sapportals.portal.pcd.gl.PcdProxyContext.lookup(PcdProxyContext.java:1810)
at com.sap.portal.productivity.desktop.runtime.DesktopStorage.loadDesktopForRuntime(DesktopStorage.java:101)
at com.sap.portal.desktop.DesktopService.getDesktop(DesktopService.java:435)
at com.sap.portal.desktop.DesktopService.getAndHangDesktop(DesktopService.java:557)
at com.sap.portal.desktop.DesktopService.getTheme(DesktopService.java:1632)
at com.sapportals.portal.prt.service.laf.LAFServiceLESS.getCurrentThemeFromThemeProvider(LAFServiceLESS.java:960)

• NetWeaver Application Server Java
• Enterprise Portal 

com.sapportals.portal.pcd.gl.PermissionControlException portal_content access denied portal runtime exception repeated unknown  , KBA , EP-PIN-NAV-AFP , Ajax Framework Page , EP-PIN-SEC-PER , Portal content ACL permissions (Roles, Pages...) , Problem