Hi @turkcankeskin. That looks like it’s probably being broken by a plugin which hasn’t been updated for the <table> to <div> change made in LTS 2.277. What version of Jenkins did you upgrade from?
If you’ve already upgraded all your plugins to the latest versions available, then you’ve taken the best step you could have already. I’d start going through the steps in the Table to div layout migration document to try and figure out which plugin is affecting you.