R xlsx Library Installed - getting security Manager error message

Post package installation (xlsx)
i Installed Java, then installed package ( Gdata) , then Active Perl.

But still not able to read xlsx file.

Error in .jcall("RJavaTools", "Ljava/lang/Object;", "invokeMethod", cl, :
java.lang.NullPointerException

I recommend trying the {readxl} package and the read_xlsx() function, or alternatively use the {openxlsx} package and read.xlsx() which does not have the Java dependency.

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If you want to read excel file that is encrypted/ password protected you need the library(xlsx) to read the file.
library(openxlsx) or library(readxl) not useful in that case.
library(excel.link) could be used but it gives error if you windows 10.