Error(s) in re-building vignettes:
  ...
--- re-building ‘ar-ssm.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

--- finished re-building ‘ar-ssm.Rmd’

--- re-building ‘arbitrary-precision-arithmetic.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

--- finished re-building ‘arbitrary-precision-arithmetic.Rmd’

--- re-building ‘fastest-route.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

--- finished re-building ‘fastest-route.Rmd’

--- re-building ‘introduction.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

--- finished re-building ‘introduction.Rmd’

--- re-building ‘linear-algebra.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

Quitting from lines 96-101 (linear-algebra.Rmd) 
Error: processing vignette 'linear-algebra.Rmd' failed with diagnostics:
AssertionError: 

Detailed traceback:
  File "/usr/lib/python3/dist-packages/sympy/matrices/dense.py", line 619, in matrix_multiply_elementwise
    return A.multiply_elementwise(B)
  File "/usr/lib/python3/dist-packages/sympy/matrices/common.py", line 2832, in multiply_elementwise
    return self._eval_matrix_mul_elementwise(other)
  File "/usr/lib/python3/dist-packages/sympy/matrices/repmatrix.py", line 239, in _eval_matrix_mul_elementwise
    rep = self._rep.mul_elementwise(other._rep)
  File "/usr/lib/python3/dist-packages/sympy/polys/matrices/domainmatrix.py", line 980, in mul_elementwise
    assert A.domain == B.domain

--- failed re-building ‘linear-algebra.Rmd’

--- re-building ‘reference.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

Quitting from lines 200-214 (reference.Rmd) 
Error: processing vignette 'reference.Rmd' failed with diagnostics:
AssertionError: 

Detailed traceback:
  File "/usr/lib/python3/dist-packages/sympy/matrices/dense.py", line 619, in matrix_multiply_elementwise
    return A.multiply_elementwise(B)
  File "/usr/lib/python3/dist-packages/sympy/matrices/common.py", line 2832, in multiply_elementwise
    return self._eval_matrix_mul_elementwise(other)
  File "/usr/lib/python3/dist-packages/sympy/matrices/repmatrix.py", line 239, in _eval_matrix_mul_elementwise
    rep = self._rep.mul_elementwise(other._rep)
  File "/usr/lib/python3/dist-packages/sympy/polys/matrices/domainmatrix.py", line 980, in mul_elementwise
    assert A.domain == B.domain

--- failed re-building ‘reference.Rmd’

--- re-building ‘sympy-object.Rmd’ using rmarkdown

Attaching package: 'caracas'

The following objects are masked from 'package:base':

    %*%, det, diag, diag<-

--- finished re-building ‘sympy-object.Rmd’

SUMMARY: processing the following files failed:
  ‘linear-algebra.Rmd’ ‘reference.Rmd’

Error: Vignette re-building failed.
Execution halted