This issue happened on JasperReorts Server version 7.2 and earlier version, and still exist in JasperReports Server version 7.5.
I decided to report this bug. I did fresh install of JasperReports server version 7.5 on development PC, means no upgrade, and the installation generated new .jrsks and .jrsksp keystore file.
Application Server: Apache Tomcat 9.0.27.
OS: Microsoft Windows 10.
JDK version: 1.8.0_212-b10
Repository database: PostgreSQL 10.x
I can still login to the JasperReports Server. But, there are some errors found in log file. The error is: ".....error closing context javax.naming.OperationNotSupportedException: Context is read only".
Steps to reproduce this error:
1. Freshly install PostgreSQL, Apache Tomcat and JasperReports Server.
2. Start Tomcat.
3. Wait for a few minutes for the startup.
4. After JasperReports Server finish startup, go to <tomcat installation directory>/webapps/jasperserver/WEB-INF/logs, open the jasperserver log file. You will see the error.
Attached here with the JasperServer log file.