My rmarkdown codes for producing pdf document (research paper) have been just working fine until today when all things suddenly changed with no reason: I swear I did not anything silly or weird. Any tip regarding how to fix this issue?

output file: ch2.knit.md

tlmgr: package repository https://ctan.math.illinois.edu/systems/texlive/tlnet (verified)
tlmgr install: package already present: l3backend
tlmgr install: package already present: l3backend-dev
! Undefined control sequence.
@tabular ->leavevmode UseTaggingSocket 
                                          {tbl/hmode/begin}hbox bgroup $c...
l.155 

Error: LaTeX failed to compile ch2.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See ch2.log for more info.
Execution halted