AEM Useradmin and Miscadmin pages are blank , and Also search inside CRX/DE home and CRX Package Manager search is not working

I tried login with Admin credentials and tried to download logs from below URL, System Diagnosis Page Download a system status ZIP export from the system diagnosis page: https://localhost:4502/libs/granite/operations/content/diagnosis.html (select Download Status ZIP). but the size of logs file is s...

07.08.2023 11:54:17.283 *ERROR* [10.242.69.100 [1691409257199] GET /content/XXX/en_us/navigation.html HTTP/1.1] com.adobe.cq.sightly.WCMUsePojo Failed to activate Use classjava.lang.NullPointerException: null            at com.adobe.cq.sightly.WCMUsePojo.init(WCMUsePojo.java:86) [com.adobe.cq.sightl...

Content pages are blank after upgrading the AEM instance to AEM service pack 6.5.15

https://domainname.html/search=true%27%20or%20true()%20or%20%27and%27%20%3D%20%27and   https://domainname.html/search=true%27%20and%20false()%20and%20%27or%27%20%3D%20%27and

 I need to add a background image field in the dialog so that it would be the background image for the component. How do I fetch it?

How can I get the publication date property and the Image property from this page in sling model