Trimmomatic – unknown trimmer?

Hi, all
I have Double End fastq file and it needs trimming. So, I use trimmomatic software for this purpose.based on trimmomatic tutorial I write below code for my .fq.gz file:

but after run it in my Terminal, I see bellow error;
Exception in thread “main” java.lang.RuntimeException: Unknown trimmer: GT1-N1.paired_GT1-N1_FRAS210028605-2r_2.fq.gz

I run this command in my data folder. so I appreciate if any body help me. Best, Hongran Liu