r语言--R中使用velocyto.R进行速率分析时遇到问题

问题遇到的现象和发生背景

在R中进行单细胞速率分析时遇到R数据格式的错误
使用github安装:velocyto.R

问题相关代码,请勿粘贴截图

在进行速率分析时报错
代码:ve40 <- RunVelocity(ve40, deltaT = 1, kCells = 25, fit.quantile = 0.02, spliced.average = 0.2, unspliced.average = 0.05, ncores = 18)

运行结果及报错内容

结果:
Filtering genes in the spliced matrix
Filtering genes in the unspliced matrix
Calculating embedding distance matrix
calculating cell knn ... done
calculating convolved matrices ... done
fitting gamma coefficients ... done. succesfful fit for 23
报错:
Error: $ operator is invalid for atomic vectors
In addition: Warning message:
In parallel::mclapply(sn(rownames(conv.emat.norm)), function(gn) { :
all scheduled cores encountered errors in user code

我的解答思路和尝试过的方法
我想要达到的结果