This error suddenly appeared in my file! It was not before what should I do?
File `calc.sty' not found. \RequirePackage
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Sign up to join this communityI'm not expert but I try this and worked.
Copy all in this link: https://web.mit.edu/ghudson/dev/nokrb/third/tetex/texmf/tex/latex/tools/calc.sty
Paste in a note block and save as calc.sty where is save your .tex file
calc
package is part of required tools bindle so should be available in every latex installation. If you are using miktex then updatelatex-tools
in the miktex console