Unable to load images on the jar file

[ShreyaKapoor18]

Dear all,

I used the command
sbt clean assembly
in order to build a jar file and then execute this particular jar file.
after executing the jar file
I am unable to load pictures onto the screen

At compile time I also get a warning saying

[warn] Credentials file C:\Users\kapoo.bintray.credentials does not exist
[warn] Credentials file C:\Users\kapoo.bintray.credentials does not exist
[warn] Credentials file C:\Users\kapoo.bintray.credentials does not exist

I tried to add a line in the build.sbt file with:

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")
export SBT_OPTS="-XX:MaxMetaspaceSize=1024m -Xms2048m -Xmx20484m"

but it does not seem to work

I wonder why, last night it was working for me but I reloaded everything again and it does not seem to work anymore.