Hi 

Am trying to load the AnnotionHub package but am getting this error

library(AnnotationHub)
Error: package or namespace load failed for ‘AnnotationHub’:
 object ‘dims’ is not exported by 'namespace:BiocGenerics'

> sessionInfo()
R version 3.5.1 (2018-07-02)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

Matrix products: default

locale:
[1] LC_COLLATE=English_United States.1252 
[2] LC_CTYPE=English_United States.1252   
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C                          
[5] LC_TIME=English_United States.1252    

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets 
[8] methods   base     

other attached packages:
[1] BiocInstaller_1.32.1 IRanges_2.14.12      S4Vectors_0.18.3    
[4] BiocGenerics_0.26.0 

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.0                    magrittr_1.5                 
 [3] bit_1.1-14                    xtable_1.8-3                 
 [5] R6_2.3.0                      blob_1.1.1                   
 [7] httr_1.4.0                    tools_3.5.1                  
 [9] DBI_1.0.0                     htmltools_0.3.6              
[11] yaml_2.2.0                    bit64_0.9-7                  
[13] digest_0.6.18                 interactiveDisplayBase_1.20.0
[15] shiny_1.2.0                   BiocManager_1.30.4           
[17] later_0.7.5                   promises_1.0.1               
[19] mime_0.6                      memoise_1.1.0                
[21] RSQLite_2.1.1                 compiler_3.5.1               
[23] httpuv_1.4.5.1               

Check that you have consistent versions of your packages

BiocManager::valid()