[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'

[DDDDXY1999]

(rnaedit_py310) python -m reditools analyze -r /public/home/rp1011mgy/rp1011menggy/dxy/GRCh38.primary_assembly.genome.fa -o /public/home/rp1011mgy/rp1011menggy/dxy/J10_edits.txt -t 16 -l 10 -bq 20 -q 20 -mrl 30 -v CT -v AG -me 3 J10_Aligned.sortedByCoord.out.bam --strand 0
[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'
[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'
[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'
[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'
[ERROR] (<class 'AttributeError'>) 'str' object has no attribute 'pop'
I met this mistake,when i was running reditools3.But when i set mrl from 30 to 40 or 50,this error disappeared.But i don't know set mrl>=40 my miss some information from bulk rna-seq during the process of analyzing rna editing.