I use GitHub Actions (R-CMD-check) to check my packages. I've been getting a strange error with R 4.0 (but not 4.1):
** R
** inst
** byte-compile and prepare package for lazy loading
Error in loadNamespace(j <- i[[1L]], c(lib.loc, .libPaths()), versionCheck = vI[[j]]) :
namespace ‘Matrix’ 1.3-2 is already loaded, but >= 1.3.3 is required
Calls: <Anonymous> ... namespaceImportFrom -> asNamespace -> loadNamespace
Execution halted
It's especially odd because earlier in the logs it states that Matrix 1.4-1 was installed. I do not see any mentions of Matrix 1.3-2 or 1.3.3.
What does this error mean?