As the title suggests, my logger no longer works, this also includes System.out and System.err,
but these still have the normal function
i have tested the logger in the following way
and that is the corresponding console output:

Nero-err
Nero-out

as you can see only the default java outputs work

this is the complete log
and the git repo

if anyone has an idea how i can repair the logger, i'm open to suggestions

Update: i found this in the log:

SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.

the fix should be:

Quote

This warning, i.e. not an error, message is reported when no SLF4J providers could be found on the class path. Placing one (and only one) of slf4j-nop.jar slf4j-simple.jar, slf4j-log4j12.jar, slf4j-jdk14.jar or logback-classic.jar on the class path should solve the problem. Note that these providers must target slf4j-api 1.8 or later.

but i have no idea how to fix this,
if i delete the .gradle folder would the problem be fixed?
i know all dependencies are stored there so if i delete the folder i need to re-import all gradle projects,
and all dependencies should be download so then it should also download a new SLF4J provider, im right?