Oracle Sql developer error: could not install some modules

Finally got the way out after some dirty hours. Initially I extracted the sqldeveloper zip in a nested directory.

i.e: E://A/B/C/sqldeveloper.
starting sqldeveloper gui from the above directory threw erros.

Solution:

• Go in C:\users**UserName**\AppData\Roaming : delete SQL Developer and sqldeveloper folders

• Extract the Sql Developer zip in a new non nested directory. i.e: E://

• Start it and should work now

Reference: https://community.oracle.com/thread/3870680?start=0&tstart=0

In my case it was enough to change JDK pass to Java 8 in the C:\Users\YourName\AppData\Roaming\sqldeveloper\19.2.1\product.conf file:SetJavaHome C:\Program Files\Java\jdk1.8.0_202

I have Java 13 as default and although SQL developer complained at startup it worked OK with it until I started it and went away from the computer, so I missed the warning screen. After that it started to show the "could not install the modules" error.

For those that are working on a linux machine, for me worked just changing the jdk version that I'm currently using. I change went to the path usr/lib/jvm/ and look for the versions that my pc have. Then in ~/.sqldeveloper/"yourversion"/product.conf I changed the Java home to java-8-openjdk (It was using the 11 version)