Jmeter save file issue

I am not able to save any J meter file , getting error

jmeter issue -You should save your test plan before running it ?If you are using supporting data files (ie,for csv data set or_stringfromFile),then its particularly important to first save your test script, Do you want to save your first test plan ).

Getting this popup again and again and not save able to save or run any file .enter image description here

In the upper right corner there is a yellow exclamation sign indicating that there are 14 errors:

Click it and JMeter will open log viewer panel and you will be able to see the error there.

Blind shot: you're suffering from JMeter Bug 65300 so the options are in:

1. Downgrade to Java 8, it's the lowest Java version JMeter 5.4 supports
2. Try out a JMeter nightly build
3. Add --add-opens=java.desktop/sun.awt.shell=ALL-UNNAMED stanza to line 112 of jmeter.bat startup script