This is pdfTeX, Version 3.14159265-2.6-1.40.19 (TeX Live 2018/Arch Linux) (preloaded format=pdflatex 2019.2.12)  13 JUN 2019 21:18
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
**beamerthemelined.sty
(./beamerthemelined.sty
LaTeX2e <2018-04-01> patch level 5
! Undefined control sequence.
l.13 \mode
          <presentation>
? 

! LaTeX Error: Missing \begin{document}.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
l.13 \mode<
           presentation>
? 
! Emergency stop.
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l.13 \mode<
           presentation>
You're in trouble here.  Try typing  <return>  to proceed.
If that doesn't work, type  X <return>  to quit.

 
Here is how much of TeX's memory you used:
 7 strings out of 492639
 311 string characters out of 6135497
 56952 words of memory out of 5000000
 3994 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 5i,0n,4p,76b,14s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!