Error in re-building vignettes:
  ...
The 'lsmeans' package is being deprecated.
Users are encouraged to switch to 'emmeans'.
See help('transition') for more information, including how
to convert 'lsmeans' objects and scripts to work with 'emmeans'.
Loading required package: mvtnorm
Loading required package: survival
Loading required package: TH.data
Loading required package: MASS

Attaching package: 'TH.data'

The following object is masked from 'package:MASS':

    geyser

Note: df set to 23
Loading required package: Matrix
Loading required namespace: lmerTest
NOTE: Results may be misleading due to involvement in interactions
Loading required package: lattice
Loading required package: carData
Note: model has aliased coefficients
      sums of squares computed by model comparison
NOTE: Results may be misleading due to involvement in interactions
NOTE: Results may be misleading due to involvement in interactions
NOTE: Results may be misleading due to involvement in interactions
NOTE: Results may be misleading due to involvement in interactions
NOTE: Results may be misleading due to involvement in interactions
Loading required package: sandwich

Error: processing vignette 'using-lsmeans.rnw' failed with diagnostics:
 chunk 85 
Error : package or namespace load failed for 'mediation' in namespaceExport(ns, exports):
 undefined exports: %s!=%, %s!==%, %s+%, %s<%, %s<=%, %s==%, %s===%, %s>%, %s>=%, %stri!=%, %stri!==%, %stri+%, %stri<%, %stri<=%, %stri==%, %stri===%, %stri>%, %stri>=%, stri_datetime_add<-, stri_sub<-, stri_subset<-, stri_subset_charclass<-, stri_subset_coll<-, stri_subset_fixed<-, stri_subset_regex<-, stri_c, stri_c_list, stri_cmp, stri_cmp_eq, stri_cmp_equiv, stri_cmp_ge, stri_cmp_gt, stri_cmp_le, stri_cmp_lt, stri_cmp_neq, stri_cmp_nequiv, stri_compare, stri_conv, stri_count, stri_count_boundaries, stri_count_charclass, stri_count_coll, stri_count_fixed, stri_count_regex, stri_count_words, stri_datetime_add, stri_datetime_create, stri_datetime_fields, stri_datetime_format, stri_datetime_fstr, stri_datetime_now, stri_datetime_parse, stri_datetime_symbols, stri_detect, stri_detect_charclass, stri_detect_coll, st
Execution halted